Holy crap - I just picked up a BBE Green Screamer and boosted my RM100 (gain 0, level on 5, Tone 6) - what a difference. The amp got a LOT tighter and more fluid. I couple weeks ago I made a post about the stock XTC module feeling kinda stiff - this took care of that! Made the XTC and Recto modules SO much clearer too, even with more gain. Crazy!