I picked one of these up as a cheap, lightweight practice amp, stuck a JJ KT66 and a greenback in it, and have found it to be a highly addictive little screamer. Its biggest shortcoming (other than the undersized cabinet, which can sound a bit boxy at low volumes) is the tone stack, IMO, which is pretty primitive; haven't tried it with EQ yet but I suspect doing so would improve its bottom end a great deal and make it sound a lot bigger. Anybody futzed with one of these? Any thoughts?