Nathan, one other thing to check that can sometimes be a problem is the pipe. Sometimes they get enough desposits to mess with the settings as you describe. Also, it's possible you have had something fail in the pipe. I have had that happen in a couple of older Aeroslaves. The newer Aeroslaves are supposed to be better as far as baffles shifting around inside. The stuff I previously described for engine maintenance is most likey how you willl solve the problem.