I just picked up my second MarkIIB. I really loved the first one I had and I have no idea why I sold it. I recently picked up another one. It's an HG with no reverb. This on seems to have some minor problems. My other one had a lot of Gain and low end and with my TS9 as a clean boost it got some of the best metal tone I've ever heard. My current one is thin, bright doesn't have a lot of gain and is muddy. First off the treble doesn't have any effect on the lead channel(pot or switch). The bass pot has very little also. I used to keep the bass on 1 on my old one and that was plenty. When I pull the lead master I don't get the usual gain boost. I can wiggle the knob and make the boost cut in and out so I'm pretty sure the pot is bad. I just ordered new power supply caps, but I'm sure more parts are about to make my list. Any advice would be greatly appreciated.