Re: If I shorten the screw poles on a JB will it tighten the sound ?
I put hex screws which were slightly shorter than the stock flatheads on my JB. They came off a DiMarzio PAF Pro... or Dominion, can't remember. They did thin it up a little, and they made it a little tighter, but not a lot. Slightly spongy/boomy low-mid response is still there. It sounds good, though. It's always sounded good, but I think the change was subtle.