What do you have your III connected to? Cabs? Studio Monitors? I usually go with what I posted above, TS808 (gain 0, level 10) into 5153 RED Gain 8.5 or so, bass and mids lowered a bit, treble up a bit, bright switch on. For IRs, I use a lot of Ownhammers - there are some loaded on your III, but...