The session on 25 April was almost cancelled, due to Jones becoming ill from colitis. Beforehand, it had been agreed that this session would be dedicated to transferring their previously recorded, 4-track recordings onto Studio 3's newer 8-track machine, for further overdubs in later sessions. At Jones' suggestion, and despite warnings the producer had received that Barrett should not be in the studio unaccompanied, Barrett went in on his own to carry out the mixing. It had been decided that nearly all of the tracks that were recorded up to that point needed further overdubbing except for "No Man's Land" and "Here I Go". At this point, Barrett considered placing "Opel" on the album, Jones calls it among Barrett's "best and most haunting" songs. On the session for 3 May, three tracks on the album were overdubbed by Robert Wyatt, Hugh Hopper and Mike Ratledge, all members of the band Soft Machine: The three songs were "Love You", (now dropping "It's") "No Good Trying", and "Clowns and Jugglers". Even after the Soft Machine members added overdubs to "Clowns and Jugglers", Barrett wished to add bass and drums to it.