Classical musicians do this all the time. They want perfection. So they piece things together. Eight bars of this and six bars of that. Glenn Gould said that with a recording he wanted to make perfect versions of pieces.
You're just sort of searching for this 'thing' and sometimes you get it and sometimes you don't. All music is imperfect, but in jazz since you're improvising, at least the way I play, I'm trying to follow my train of thought in a solo.
On record dates like that I never felt too nervous because everything was really overdubbed. When we did that album, we were in the studio for probably a week, so you had a lot of opportunity to fix things.
As Eric Dolphy said 'Once you play the music, it's in the air. It's gone'. And that's true. But when you record it, it comes back to haunt you sometimes.
I don't remember what was going through my mind, but what was going through my body was fear and terror. I had been on the road with Johnny and working gigs and playing a lot of the organ clubs.