I posted over at the Boogie board, but it is not going through... Anyways, there is a guy selling a Mark II locally for what I think is a pretty smoking price. He bought it brand new in 1981 and has not modded it or anything. However, "MB" is written on the back which I thought was a sign of modification. Did some of the amps come stock with Mike's mods? I'm going to go check it out in the next couple of days, but just wanted to go in knowing all that I could.