To the Group - I have an OLP Tony Levin Signature bass on the way and I understand that it does a pretty acceptable Stingray imitation. That's cool but I'd like to give it some additional versatility. It comes stock with an MM-style pickup and a 9V preamp with V/B/M/T pots -- but I don't know who manufactures the pup or the preamp. I've spoken to my bass tech about adding a Jazz pickup in the neck position (specifically a Seymour Duncan Jazz stack in order to avoid an SC hum) but I'm not sure how to have him install the wiring & switching. What I was thinking about was: Changing the volume pot to a stacked volume/blend Having a series/parallel switch. In position one, both pickups would be in parallel. In position two, the pickups would run in series. I do know that many MM pickups are actually configured as TWO pups and there is series/parallel switching between them. However, I don't know how the electronics in this particular bass are set up. I also know that there are some unorthodox options (5-way strat switches and such) that I could employ. Bottom line, I am asking the experts here at TB for some advice/suggestions on options that I can consider. Thanks in advance! P.S. I really don't want to change out the stock preamp or the stock MM PUP at this time. I know that Nordstrand and some other folks offer some interesting options for this bass but I don't want to spend a fortune.