1 Deep 4 months ago I've been intrigued by the Atomic Brain or rather the Mystery Brain which I believe is Atomic plus a tape delay. I have RC booster as my always on pedal mostly used to change EQ and for occasional slight boost for all my different guitars. So how does the Atomic Brain compare with RC booster? Does it only compliment Gretsches or works equally with single coil Humbucks and P-90's loaded guitars? Would the move to an AB be a significant upgrade over the RC? Thank you!