I know what you mean. If we're talkin' Binci, I can manage all bassoon pull reeds, in any key. With the mids, I can manage about 5 down in most keys. The highs only the first three or four.
Ditto what Bryan said. I doubt most of those reeds are really that far off as I'm sure Doucet tuned it at some point.
I know Randy Falcon tunes his accordions on the push so that the reed being tuned is on the top and then once he finishes tuning all of the reeds flips them all over to tune the pull, which is now on the push. Some people seem to say that's a waste of time on his part instead of catching the underside of the reeds but from my experience his accordions seem to be the most "in tune" when they leave the shop.
I also tune the pull reeds in the push position when they're off by more than fine tuning. Saves a lot of lifting. Then I fine tune in the correct position.