Just got an M-6 and it has a crazy pitch lever - extremely sensitive or completely unresponsive, seemingly randomly.  Sometimes a pitch bend will stick and set the board out of tune.  Thinking a dirty pot to blame, jumpered another across the wires and got the same behavior.  Anybody have an idea what could be the problem here
Oh yeah, and the mod lever doesn't work at all.  :(
Thanks,
JV