Philips SFX - 10508 -  Dizzy Gillespie & The Double Six Of Paris - rec. Paris & Chicago 1963 Featuring Bud Powell (1st session)           

Unimpeded.

Ok, one master tape being used 100s of times over the years makes more sense than one tape just being used to record on 100s of times. Or one machine being used just 100s of times. If I was an editor, I would ask for a more clear delineation of the shifts of context between "two tape decks" "one set" and "assembled". Somebody like me who doesn't really speak English (or so it has been accused) can (and) did) get confused!

I saw them perform that, very special