1 12Bars 10 months ago I am only referring towards my lowly 5420. A mod like that in place of the master volume would add many tone variations.I have a Gibson BluesHawk, (Strange guitar, but keeper) I think it could turn a Gretsch into a real screamer.The varitone has 6 tone positions. One being "idle." 6 tones X 3-position pickup switch = 18 tones. My little black BluesHawk has a glitch on the pickup switch, and has a 4th position in between, giving me 24.