and at the Casbah. He was shocked at the vast improvement in their playing and singing, and remembered Best's drumming to be very powerful, which pushed the group to play harder and louder. It was probably thanks to McCartney that Best developed a loud drumming style, as he often told Best in Hamburg to "crank it up" (play as loud as possible). When the group returned to Hamburg, by which time McCartney had switched to bass, Best was asked to sing a speciality number written by McCartney, "Pinwheel Twist", while McCartney played drums, but he always felt uncomfortable being at the front of the stage. "My Bonnie" The reunited Beatles returned to Hamburg in April 1961. While they played at the Top Ten Club, singer Tony Sheridan recruited them to act as his backing band on a recording for the German Polydor label, produced by bandleader Bert Kaempfert, who signed the group to a Polydor contract at the first session on 22 June 1961. On 31 October 1961, Polydor released the recording "My Bonnie" (Mein Herz ist bei dir nur / My heart is only for you) which appeared on the German charts under the name "Tony Sheridan and the Beat Brothers"—a generic name used for whoever happened to be in Sheridan's backup band. The song was later released in the UK. There was a second recording session on 23 June that year, and a third in May 1962. Decca and Parlophone Brian Epstein, who had been unofficially managing the Beatles for less than a month, arranged a recording audition at Decca Records in London on New Year's Day, 1962. The group recorded 15 songs, mostly cover versions with three Lennon–McCartney songs. Best also recorded the song "Going Back Manchester" with Lennon at this time, which would later feature as a bonus track on the special edition of his album Best of the Beatles, the rights of the song belonging to Best due to a legal technicality. A month later, Decca informed Epstein the group had been rejected. All the band members were informed of the rejection except for Best. Epstein officially became the manager of the Beatles on 24 January 1962 with the contract signed in Best's house. Epstein negotiated ownership of the Decca audition tape, which was then transferred to an acetate disc, to promote the band to other record companies in London. In the meantime, Epstein negotiated