hmm, i didn't notice 2 gk heads, i saw a crate combo, one gk head, and a boogie bass head. i couldn't see what buzz was playing out of put if i recall he plays either a hiwatt or a sunn pre amp or something like that, but i liked that lit up box on top of buzz's stack that said the melvins, and he turned it around to say thanks at the end of the show. he did the same thing back when i saw them in '03.
and those travis bean guitars were sick