owch. as shifty as ive been on how much i really need/love my rkII i still don't think I'll give it up. I've had it for like 5 months almost and I think I might, the more I hear it, need a Mark IV more than a RKII, but I still like it. If i get a Mark IV later on will that be just dumb, or will they really be distintively different? I gotta ask mesa about the thicker 12ax7's cuz i have the same problem but not on as big of a scale with the dead CH 2 and its all buzzy and broken up. i hear the crackle of tubes when i turn the baby off