Gregory, thanks for the input on pots. Here's the current situation: I positively LOVE the QP's tone and response in the neck position -- I don't want to change a thing there. The Custom HB in the bridge spot is kinda shrill (I always find bridge pickups to be too trebly). For the bridge pickup, I'm looking for a good strong clean tone without excess highs. Are you saying that a 500k pot would make that pickup even more trebly? It was my understanding that single-coils do best with a 250k, and HBs with a 500k. Hence the mention of a concentric 250k/500k dual pot, to cater to each pickup in this installation. I dispensed with the guitar's tone pot years ago, since I almost always had it dialed out. I like the controls on a guitar to be at an absolute minimum, and as out-of-the-way as possible.