Hi! If you got an amp without an fx-loop, with master volume, and run the pre-amp dirty, it can be difficult to bump the volume up or down and keep the same level of dirt. A feature I would like would be a footswitchable cut to the master volume. I'm saying cut because in my simplified understanding you somehow could switch in an added resistor to basically simulate the volume being turned down a bit. You would then use the cut engaged on rythm parts and then press the footswitch for a perceived boost in volume for solos. Would this be a feasible mod to non fx-loop master volume amps?