Hi guys, I wanted to get some of your input on this problem, although John East has definitely been trying to help me figure it out and find a remedy. The bass is a custom Kinal DK-5 with custom Kent Armstrong soapbars, Graph Tech piezos, and a custom John East preamp. The preamp is a modified 5-knob U-Retro. (The five knob version has a passive blend, unlike the active blend in other East preamps.) I have a serious tone suckout when I blend the magnetic pickups together. We have flipped the wires on the pickups, but they are not wired out of phase with each other (the problem was worse when we tried that). If I can't get the pickups to blend, then I'm going to have to sell them and get something else, but I like them and don't really want to do that. The pickups are two different styles. The neck pickup is a proprietary design that Kent calls the SS. It's like the one that JP used in JPBasses. It's essentially a humbucker flipped on its side, so it acts like a single coil but is dead quiet. It has a huge fat tone similar to a P bass, but probably bigger sounding. The bridge pickup is a dual coil humbucker, real aggressive sounding, cutting tone, not as warm. With a DC test the neck reads 21K and the bridge 14K. This is odd as the bridge is usually hotter, but Kent said due to the proprietary design of the neck pickup the DC shouldn't affect the output and that this is correct. To my ears, they sound very different, but they have similar output. We've tried two other blend pots, with no improvements. Kent's solution was to use a concentric volume pot instead of a blend, and to test it passively first. He said that would fix it. The blending of the pickups loading into each other is the most likely problem, but Kent assured me that the pickups are okay and I don't need to have another one made to match one or the other. Problem is, I don't like the concentric volume idea because there are so many other controls on this bass, it'd just be too much, and harder to set levels. John East was thinking of sending me something to buffer the pickups, but won't that mean I'd lose the passive blending capability? John might have something up his sleeve though... I thought about this earlier tonight...what about a 4-pos. rotary switch? Neck pickup solo/Neck and bridge parallel/neck and bridge series/Bridge pickup solo. Would that work? There's a series/parallel/single switch for the bridge pickup now, would that work with the rotary pot?