Hi there, do you know location of VR2? I believe that's the one I need to change. I labeled the black square ldr's 1-4. I don't know schematics but can do basic stuff. I ordered the parts but looks to be an ordeal to pull the board off. I may just clip legs of old one and attach to those. I believe the dirty channel is leaking into the clean causing weird ring mod type sounds at low volume but goes away when turned up. I know its normal for the clean to leak into the lead channel but not the other way around.