The jury convicted Pedro Talamas, Hiram Lee Bauman, and John Cary of two cocaine importation charges, conspiracy to import cocaine and conspiracy to possess cocaine with the intent to distribute it. Julio Maceo was convicted of conspiracy to possess cocaine with the intent to distribute it. The appellants argue that: (1) there is insufficient evidence to establish one single conspiracy; (2) there is insufficient evidence to support their convictions; (3) the jury should not have been given a deliberate ignorance instruction; and (4) the trial *1194 judge improperly admitted into evidence Bauman’s personal use of cocaine and his receipt of cocaine as legal fees, and Cary’s distribution of cocaine to Las Vegas casino operators. We find no error and affirm. 1
I
At trial, the principal witnesses were co-defendants who testified as government witnesses. These witnesses testified to the following course of events. In 1981, Idana-el Martinez and Pedro Talamas met in Bogota, Columbia, to discuss the possibility of importing cocaine into the United States. Sometime later, Martinez secured a kilogram of cocaine and travelled to Miami, where he sold it to Talamas. About a month later, Martinez and Talamas arranged a second deal. Talamas’s couriers met Martinez in Costa Rica, received two kilos of cocaine from him and delivered it to Talamas in Miami, who then sold it to Winston Vidiella-Lopez.
In January 1982, after assuring Martinez that he could distribute any cocaine Martinez could deliver, Talamas introduced Martinez to Vidiella-Lopez and other drug traffickers. Martinez told Talamas and Vi-diella-Lopez that he could import larger quantities of cocaine and that he was “counting on their business going well.”
Martinez later met Pedro Ortegon, a major Columbian supplier. In July 1982, Martinez set up residence in Miami. One month later, Martinez received 45 kilos of cocaine sent by Ortegon. Martinez sold two kilograms to Talamas and sold the rest to Vidiella-Lopez and others. Between August 1982 and May 1983, Ortegon shipped hundreds of kilos of cocaine to Martinez. Martinez resold approximately twenty-one kilos to Talamas and far greater amounts to Vidiella-Lopez.
There was testimony that Martinez and Vidiella-Lopez were acting as partners. In October 1982, Vidiella-Lopez arranged for the safekeeping of over 100 kilograms of cocaine that Martinez had been storing in his home. They discussed setting up their own transportation network to import drugs directly from Columbia.
In pursuit of that idea, Martinez and other co-conspirators bought three airplanes from John Cary. In December 1982, John Cary sold Martinez and Robert Watkins a Baron 58 airplane in exchange for two kilograms of cocaine. In early 1983, Cary sold Martinez a Piper Navajo with extra fuel tank capacity, in return for six kilograms of cocaine. Martinez arranged for payment by calling Vidiella-Lopez, who sent Julio Maceo to New Orleans with the cocaine for Cary. After the second plane was seized by custom officials, Martinez arranged to buy another Piper Navajo from Cary. This time, however, Cary did not accept merchandise as payment, but instead received 10,000 ounces of silver, because the owner of the plane needed money. This third plane was the one used in Martinez’s first successful importation into the Savannah area. Martinez intended to purchase a larger plane and began paying installments of cocaine to Cary. Martinez had Edward Tejeiros drive from Florida to Fort Worth to deliver a van and cocaine to Cary. Later that summer, Mario Ginoris made a similar trip. All total, Martinez sent Cary twenty-three kilos of cocaine in anticipation of purchasing a fourth plane.
Hiram Lee Bauman, a Florida attorney, performed a number of services in connection with Martinez’s and Vidiella-Lopez’s drug dealings. Vidiella-Lopez testified that Bauman was his “trust lawyer,” providing him advice about the illegal things he did and how to avoid detection. After the second plane Martinez had bought from Cary was seized by the government, Bau-man unsuccessfully attempted to get it back for Martinez. Bauman claimed the plane was owned by I.C.E., Inc., an aviation *1195 company that had purchased the plane in January 1983. Martinez testified, however, that this corporation was not formed by Bauman until after the plane was seized. Martinez also paid Bauman to secure the release of a different plane owned by David Ledford. Bauman was successful and the plane was used by Martinez in February 1984 to import a large shipment of cocaine into Louisiana.
Bauman assisted Martinez and Vidiella-Lopez in purchasing the third airplane from Cary in return for the silver. Vidiella-Lopez told Bauman he wanted to have the plane registered in a phony name in case there was trouble later. Bauman also convinced Martinez to bail Watkins out of jail because otherwise Watkins might talk to the police about Martinez and Vidiella-Lo-pez. Bauman changed smaller currency into larger currency for Martinez and Vi-diella-Lopez so that it could be shipped back to suppliers more easily and so that Martinez and Vidiella-Lopez would not be identified on transaction reports. Bauman represented Mario Ginoris, one of Vidiella-Lopez’s drug operatives, on two separate occasions and received cocaine as legal fees. Bauman also restored Mario Ginor-is’s driver’s license, enabling him to drive imported cocaine from Georgia to Miami.
After Vidiella-Lopez’s arrest in 1984, Bauman helped him secure his release on bond and then remained in contact with him while he was a fugitive. Bauman assisted Martinez in purchasing a house for $270,000 cash. The house was to be purchased in a corporation’s name in order to hide the true identity of the owner, but because the corporation was not qualified to do business in Florida, Bauman purchased the house as trustee for the unidentified corporation.
Martinez continued to import drugs into the United States. In spring 1983, Martinez imported 374 kilos of cocaine from Columbia to the Savannah, Georgia area. Paul Cotton, the pilot, used the third plane sold by Cary. Vidiella-Lopez’s men transported the cocaine from Georgia to Miami, where it was stored in Maceo’s rental home. Maceo called Martinez to let him know the importation was successful. Vi-diella-Lopez, his men, and Bauman had a celebration party in Vidiella-Lopez’s Miami home. From Miami, Martinez distributed the cocaine to persons designated by Orteg-on and to his own customers, including Talamas.
After Vidiella-Lopez and Paul Cotton were arrested, Talamas introduced a new pilot, David Ledford, to Martinez. In February 1984, Martinez employed Ledford to run a large shipment of cocaine into the United States, this time through Louisiana. Martinez experienced a shortfall when making his deliveries and Talamas helped Martinez out by selling him two kilograms of cocaine.
The third direct importation occurred in August 1984. Ledford picked up the cocaine in Columbia and transported it to a place near Galveston, Texas, where it was loaded onto a van. By then, Ledford was cooperating with the federal authorities; one of the offloading men was a DEA agent. The drugs were seized and Martinez sent a newspaper article about the incident to Ortegon to prove the drugs had been seized.
In October 1984, Martinez attempted the fourth direct importation. Ledford picked up the cocaine in Columbia from Ortegon and flew it back to Houston, Texas. Martinez planned to travel from Houston to Miami once the drugs were delivered in order to arrange for distribution. Martinez was arrested at the Intercontinental Airport in Houston.
II
On April 15, 1987, the defendants were indicted by a federal grand jury. On September 2, 1987, a superseding indictment was filed charging Bauman, Cary and Tala-mas in four counts and charging Maceo in one count. After a jury trial in the United States District Court for the Southern District of Texas, the defendants were convicted of all counts charged in the indictment. Defendants Bauman, Cary, and Talamas were convicted of conspiracy to import cocaine into the United States under 21 U.S.C. § 963, conspiracy to possess cocaine *1196 with intent to distribute it under 21 U.S.C. §§ 841 and 846, and two substantive counts of cocaine importation under 21 U.S.C. § 952 and § 960, one importation into Galveston, Texas and one into Houston, Texas. Defendant Maceo was convicted of conspiracy to possess cocaine with intent to distribute it under 21 U.S.C. § 846.
Bauman received a fifteen year prison sentence, while Talamas, Cary and Maceo were sentenced to twelve year prison terms. The prison terms of Talamas, Cary and Bauman are to be followed by three year special parole terms, and Talamas was additionally sentenced to a five-year term of supervised probation requiring payment of a $10,000 fine.
Maceo, Talamas, Bauman and Cary all filed motions for judgment of acquittal, which were denied. The defendants have timely appealed their convictions.
Ill
The four appellants raise numerous points on appeal, the majority of which clearly lack merit. Bauman argues that: (1) the evidence is insufficient to support his conviction on four counts; (2) the district court reversibly erred by providing the jury with a deliberate ignorance instruction; (3) the district court impermissi-bly admitted into evidence testimony about extrinsic offenses; and (4) the district court violated his right to due process during his sentencing because it relied upon incorrect assumptions. Cary argues that: (1) there is insufficient evidence to support his conviction; (2) there was an impermissible constructive amendment of the indictment because evidence was introduced regarding his distribution of cocaine to Las Vegas casino operators; (3) the judge impermissi-bly testified as a witness and limited the scope of cross examination; and (4) the trial court incorrectly gave the jury a deliberate ignorance instruction. Maceo argues: (1) that there is insufficient evidence to support his conviction; and (2) that there were multiple conspiracies rather than one large conspiracy and that he was not a member of the conspiracy which imported cocaine into Texas. Talamas argues that there is insufficient evidence to support his conviction because the evidence establishes two conspiracies and that he was not involved in the conspiracy to import and distribute cocaine into Georgia and Texas.
IV
A
Maceo and Talamas both contend that the evidence establishes more than one conspiracy, that they were not participants in the later conspiracy to import cocaine into Texas, and therefore, that they were convicted of a conspiracy in which they did not participate. We must affirm the jury’s verdict unless the evidence, examined in the light most favorable to the government, would preclude reasonable jurors from finding that one overall conspiracy existed beyond a reasonable doubt.
United States v. DeVarona,
The defendants’ common purpose of importing cocaine into the United States for distribution easily satisfies the first criteria. During the entire period in which these defendants were involved in the drug trafficking with Martinez, the central goal for all of them was to further the importation and distribution of cocaine. The fact that the location of importation and some of the participants changed does not affect our conclusion that the defendants and other co-conspirators had a common purpose.
In determining whether the nature of the scheme suggests a single conspiracy, this
*1197
court has avoided making analogies to wheels or chains.
Id.; United States v. Richerson,
With respect to the third factor, this Court “has recognized that a single conspiracy can involve one pivotal figure who directs illegal activities while various combinations of other defendants further those activities in different ways and at different times.”
Id.
at 119 (referring to
Elam,
B
All four of the appellants contend that there is insufficient evidence to support their individual convictions. In considering the sufficiency of the evidence, we must view the evidence in the light most favorable to the government and decide whether any rational trier of fact could have found the essential elements of the crime beyond a reasonable doubt.
DeVarona,
As discussed above, there was sufficient evidence introduced at trial from which a rational jury could have concluded that there was one large overarching conspiracy to import cocaine and to possess cocaine with the intent to distribute it. There is also sufficient evidence to support the conclusion that each of the four appellants knew of the conspiracy to import cocaine and to possess cocaine with the intent to distribute it, and that they each voluntarily participated in it. Talamas was crucial to the early stages of the conspiracy. He was involved in the first smaller importations, he introduced Martinez to Vidiella-Lopez and he remained a customer of Martinez’s. Later, he introduced David Ledford, the pilot who flew both runs into Texas, to Martinez and he also sold Martinez cocaine when he was short. Cary also voluntarily participated in what he knew was a conspiracy. He sold Martinez three planes, two of them in exchange for cocaine. He was also receiving cocaine as installment payments on a fourth airplane. Bauman also knew there was a conspiracy and furthered it by representing VidiellaLopez and Martinez in various “legal” matters. He laundered money for them, tried to recover seized planes through illegal means, bought a house for cash in his name to hide their ownership and helped *1198 them purchase the third airplane from Cary. There was plenty of evidence that Maceo was also a confederate in the conspiracy. He delivered cocaine, stored it in his home and was Martinez’s source of information regarding the success of the importations. The record shows that he was associated with Martinez’s drug trafficking scheme until Martinez was arrested. Therefore, we find that there is sufficient evidence from which a jury could find that one single • conspiracy existed, that each of the defendants knew about it and that each voluntarily participated in it.
The underlying convictions of importation of cocaine were based on
Pinkerton v. United States,
V
A
Bauman and Cary contend that the district court reversibly erred by providing the jury with a deliberate ignorance instruction. They both claim that the deliberate ignorance instruction should not have been given at all. Neither made a specific objection to the deliberate ignorance instruction at trial. Bauman objected to the wording of the deliberate ignorance instruction, but did not suggest that it should not have been given in any form. Cary made no objection. Because the defendants did not specifically object at trial to the instruction, they must show it was plain error. Fed.R.Crim.P. 30, 52(b);
United States v. Ortega,
B
Both Cary and Bauman argue that the trial court improperly admitted extrinsic evidence. Bauman claims that the trial court repeatedly allowed testimony about Bauman’s personal use of cocaine and his receipt of cocaine as legal fees. Bauman objected to the testimony at trial, but the district court allowed it, arguing that the testimony showed Bauman knew Martinez and others were dealing cocaine. Bau-man’s counsel requested the court to consider whether the probative value of the testimony outweighed the prejudicial effect. The court did not explicitly perform a balancing test on the record.
Bauman argues that the evidence was admitted in violation of Rules 403 and 404(b) of the Federal Rules of Evidence.
2
Rule 404(b) only applies to evidence of extrinsic offenses.
United States
*1199
v. Simpson,
We also find that the admission of the testimony did not violate Rule 403, which allows a trial judge to exclude probative evidence that is substantially outweighed by its prejudicial effect. “[The] balancing of probative value against prejudicial effect is committed to the sound discretion of the trial judge, a decision that is final in the absence of abuse of discretion.”
United States v. Thompson,
Cary argues that the district court improperly admitted into evidence testimony about his distribution of cocaine to Las Vegas casino operators and that the jury convicted him of that crime, instead of the crime for which he was indicted. Cary's argument must fail for the same reason Bauman’s did. Paul Cotton testified that when he and Cary were in Las Vegas they received royal treatment because the casino operators liked Cary’s cocaine. The testimony admitted was not evidence of an extrinsic offense, but was inextricably intertwined with the crime with which Cary
*1200
was charged. The trial judge overruled Cary’s attorney’s objection to the testimony, stating that a jury could infer a number of things from it related to the conspiracy, including the inference that Cary received cocaine as payment for the plane. Therefore, agreeing that the evidence was not extrinsic, we hold that it was properly admitted.
Randall,
C
Bauman contends that his right to due process was violated by the district court’s sentencing because the district court relied upon incorrect or unsupported assumptions. At sentencing, the district court relied upon Bauman’s acts of bailing Watkins out of jail and obtaining the airplane seized by law enforcement officials as grounds establishing his significant involvement and culpability. The district court stated that Bauman knew Watkins had been involved in drug trafficking and that he knew the plane had been used to transport drugs. Furthermore, it was clear that Bauman had abandoned any professional role and was personally involved in the illegal conspiracy. Thus, these assumptions are certainly supported by the record, and therefore did not violate Bauman’s right to due process.
D
Cary argues that the trial judge impermissibly testified as a witness and limited the scope of cross-examination. When Martinez was on the witness stand, Cary’s trial attorney questioned him about the terms of his plea bargain in an attempt to show that the witness had a greater incentive to lie. The court intervened and objected that counsel had misstated the law of plea bargains. Cary claims that in doing so, the judge violated Fed.R.Evid. 605, which bars a judge from testifying as a witness. The judge did not impermissibly testify as to any fact issue when he told Cary’s attorney he was misstating the law. Rule 605 does not apply here.
Cary also argues that the judge violated his Sixth Amendment confrontation rights by limiting his right to cross-examine Martinez about his plea agreement in order to show his bias. The Confrontation Clause does not prohibit a trial judge from limiting cross-examination where the testimony would confuse the issues, is repetitive or only marginally relevant.
Delaware v. Van Arsdall,
E
Maceo argues that the district court in the Southern District of Texas did not have proper venue because Maceo never went there. This argument necessarily fails since we hold that there is sufficient evidence to support the jury’s finding that there was one conspiracy. “Venue is proper in conspiracy offenses in any district
*1201
where the agreement was formed or an overt act occurred.”
United States v. Winship,
VI
In summary, we find no basis for reversal of the district court. There was sufficient evidence to support the jury’s finding that one conspiracy existed and to support each of the convictions. Neither the deliberate ignorance instruction nor the admission of evidence of Bauman’s personal use of cocaine and of Cary’s distribution of cocaine was reversible error. Defendants’ remaining claims lack even colorable merit. The trial court was correct in denying the defendants’ motions for judgment of acquittal. Therefore, the decision of the district court is
AFFIRMED.
Notes
. This case originally was scheduled for oral argument as to all four defendants, each represented by his own attorney. Because of an unexpected scheduling conflict, Talamas’s attorney requested a continuance of oral argument as to Talamas. We excused counsel from argument and heard argument from the government and defense attorneys as to the appeals of Ma-ceo, Bauman, and Cary only. We now have determined that oral argument on behalf of Talamas is unnecessary and would provide no benefit to the court in resolving this case.
. Rule 403 provides:
Although relevant, evidence may be excluded if its probative value is substantially outweighed by the danger of unfair prejudice, confusion of the issues, or misleading the jury, or by considerations of undue delay, waste of time, or needless presentation of cumulative evidence.
Rule 404(b) provides:
Evidence of other crimes, wrongs, or acts is not admissible to prove the character of a person in order to show action in conformity therewith. It may, however, be admissible for other purposes, such as proof of motive, opportunity, intent, preparation, plan, knowledge, identity, or absence of mistake or accident.
. Bauman contends that the district court violated the two step test established by this Court in
United States v. Beechum,
. This court has only required a trial judge to make on-the-record findings when counsel requests in the context of a
Beechum
analysis involving extrinsic evidence. Since the evidence here is not extrinsic,
Beechum
does not apply. But even under
Beechum,
the absence of on-the-record findings, when balancing was requested, does not mandate a remand. "In the absence of on-the-record findings in response to such a request, we will be obliged to remand unless the factors upon which the probative value/prejudice evaluation were made are readily apparent from the record, and there is no substantial uncertainty about the correctness of the ruling.”
United States v. Robinson,
. The trial judge specifically instructed the jury to consider evidence of other possessions only to determine the defendant’s intent. Cary argues that he should have also mentioned distribution. At best, the district court’s failure to more fully instruct the jury is harmless error.
