I play a lot of micro venues, mostly with acoustic guitar and banjo run through LR Bagg Para DIs into a board. However I have been really getting into electric stuff recently, bought an Epi LP Standard and rewired the whole thing with SD SH-55s. Totally pleased with the result. now to the amp bit For the money the Micro Terror seemed to solve all of my problems perfectly. Super small so it fits in all the venues I play, still has some tubeness, etc. etc. and when I first got it I was pretty pleased. However i'm a blues guy, and I found that i couldn't really turn the gain knob past 12 o'clock without getting into some not so bluesy territory. Quick swap of the preamp tube 12ax7 to the 12at7 and i couldn't be happier. The gain knob now gives me usable amounts of crunch and cleans throughout the whole sweep and it seems to have warmed up the tone quite a bit. Anybody else play around with the tube in these things?