http://jvmforum.com/phpBB3/

That stinks, I just made an account there a few months ago.
My JVM210H has turned out to be my favorite amp I've ever owned (so far) and I was looking at the information on there regarding adding a choke, the C83 mod, negative feedback, etc etc. That and maybe acquiring a 205H as a 2nd head and giving it 5881 power tubes.
Guess I'll have to go to marshallforum.com or something like that.