<P> Three takes from 22 February were edited into a master (second generation), which was overdubbed, mixed down on 18 April (third generation), and overdubbed on 18 April, 20 April, 8 August and 11 August . Different overdubs were made to the second generation tape on 8 August . The mix is the third generation for 4: 37 and then the second generation tape, which has white noise produced by the Moog synthesizer played by Lennon and additional drums added on 8 August . The final overdub session for "I Want You (She's So Heavy)", which included the final mixing and editing, was the last time all four Beatles worked in the studio together . </P> <P> The final master lasted 8: 04, but Lennon decided on a surprise ending . During the final edit with the guitars, drums and white noise climaxing endlessly, he told recording engineer Geoff Emerick to "cut it right there" at the 7: 44 mark, bringing the song (and Side 1 of Abbey Road) to an abrupt end . On Love, the three - minute stretch of repeated guitar chords that ends the song intercuts with elements of "Being for the Benefit of Mr. Kite!" and "Helter Skelter", while retaining the abrupt cut to silence at the end . </P> <Ul> <Li> John Lennon--lead and harmony vocals, multi-tracked lead guitar, Moog synthesizer </Li> <Li> Paul McCartney--harmony vocals, bass </Li> <Li> George Harrison--harmony vocals, multi-tracked lead guitar </Li> <Li> Ringo Starr--drums, congas, wind machine </Li> <Li> Billy Preston--Hammond organ </Li> </Ul> <Li> John Lennon--lead and harmony vocals, multi-tracked lead guitar, Moog synthesizer </Li>

Who plays lead guitar on i want you she's so heavy