it's not skb.. it's a custom made head/rack combo case (back panel has foam which could probably be either removed or trimmed for more space), which i have a mark iv head in and and quad preamp controlled by 2 gcx switchers. and i'm thinking of selling the mark, the quad and a gcx and doing a triaxis/JMP-1/2:90 setup; signal path also controlled by the GCX to get the best of both mesa and marshall worlds. I would get more verstality plus.. less space taken up by poweramp and preamp stuff. i'd simply take the head out of the bottom and built a small rack case for a
power amp and something else. maybe just leave space for ventilation for the power amp, but thats what i'm thinking right now.