I'd like to swap out the lipstick pickup and the pots on a Harley Benton Resobass. Perhaps the cone as well. I'm looking for recommendations. The stock pots are stamped "ALPHA B500". The volume pot works as it should, but the tone pot does virtually nothing. Rotating the tone knob 100% accomplishes as much as turning a tone knob 5% on any other bass I've played. The stock "lipstick style pickup" has a (standard?) screw spacing of 89mm. It is very bassy and low output. It would be nice to brighten up the amplified sound of the instrument. I can't resolve these issues with effects pedals, it's almost as if the signal bypasses them entirely. The cone (9 1/2") has dulled overtime. It's a relatively cheap Korean made bass, but I get a lot of use out of it, so I figured I'd ask what's out there.