You do a whole-step bend at the 12th how often?
If you do this commonly in performance, then I can see how it might be an issue, but if you're just doing it for argument's sake, then that's a pretty sketchy basis on which to say that polepiece alignment is an issue.
It's not the same bass, but the amount of movement required to attempt a whole-step bend popped the G-string out of the saddle on my Alembic, and I didn't even get the full bend, so I'm not sure how possible it is on other basses, but it's certainly difficult.
Whole step bends? Not that often. However, I am playing along with Steve Morse's Cruise Missile right now, and -- at least the way I learned it -- that requires me to bend a whole step at the 17th fret G-string. Hey I can live with the volume drop, I guess
edit: awaiting smart Dave LaRue comment regarding Steve Morse tunes, and EB basses...
