I have a few different control types including SC signature, Spoiler( V, T, Q switch, selector switch) and Custom Excel(V, P POT, TONE, Q POT) and a Spoiler Exploiter with V, V, TONE. I am most pleased with the simplicity of Spoiler electronics. I chose them for my latest Excel 5 w/ dual fatboys. Mica said Otay! I prefer switches to pots for a definite tone each time. But I know many Alembicians love tweeking their knobs.