This is the second 500k blend pot I've gotten. The first was Bournes from allparts, the second was Alpha from stewmac. In both, there's essentially zero change in the tone until you hit the center detent. So it's more like a switch. Both pots say MN500K. I should add that the pickups are Q-Tuner BS, neck and bridge. Is this a peculiarity of Q-tuners, that they don't blend smoothly? Or am I actually using audio taper blend pots, when what I really need is a linear taper blend pot? For reference, the blend pot that came with my bass says B250KX2 (no brand name anywhere), as part of an active Bartolini harness, and it did blend smoothly between 2 Duncan pickups. Figured I'd swap it for a 500K pot for a little more highs.