This is my modded VJ Combo Not too much done really stock speaker stock OT. R1 1M ohm, Master volume 500k added in place of r5, R8 1.2k ohm, R9 680ohm C3&C4 2.2uF and an attenuator to keep it a sensible room listening levels. Guitar Tokai Strat. First on the clip is the bridge pick guitar at full volume for a dirty sound. Next on the clip is the middle pickup, volume on the guitar dialed right back for clean sound lastly is the neck pup volume about half way on the guitar so the am breaks up on the double stops. At all times the amp has both volume controls between 2and 3 o'clock.