I had a chance to gig the new Machine Head Pedals Code Green v4 the other night. My rig was a hardtail strat> Code green> AD-9 delay> SF Fender amp set clean. The fuzz sounds were superb but the big news was the clean-up. I was using it as I would a Fuzz Face, with the gain up and controlling it with the guitar's volume knob. Once dialed in, I found it possible to go from delicate "Lenny" strat cleans to some pretty thick fuzz using only the guitar's controls with lots of nice OD textures in between. I've been through a lot of fuzz pedals but have never played anything quite like it. Everything I needed was right under my hands all night. I haven't tried any earlier versions of the CG but I do know that this new one is different enough to require it's own circuit board. Hats off to Keith! His hard work has paid off once again.