I've wired and assembled my old project bass. Here's the situation: * Pickups are P-J configuration. * Tone seems to be working. * Grounding OK - no buzz. * Either pickup individually is fine with volume maxed. * The volume controls seem to be working very poorly - about 90% of the volume gain is in the last 10% of travel for both pickups (don't know about tone) * With both pickups all the way up the volume drops gigantically and the sound is thin and weak. I used the J-Bass wiring kit from Stewart-McDonald, the pots are 250K. The pickups are a Reverend pickup for the P bass and a Fender single coil from a 1995 MIM Jazz Bass. What did I do wrong?