Oh dear, crack addicts, what did I start? (I assume it was my post...) :lol:
That's what I worried about shobet - on the first guitar I did 1/4 turns on opposite screws until it happened. Didn't really seem to matter that much what order I did it in. What I do now is loosen (and re-tighten) the "body end" screws first - one of our builders might be able to tell me whether this is a good or bad thing.
Main thing is, if the neck is going to move, it doesn't take much loosening at all. And I try to remember how many 1/4 turns for retightening afterwards - I have a history of over-tightening screws on anything :lol: