Hello Brach,
I just did this mod with R2 at 220k, and R3 as a 500k trimpot today, and wanted to report back that it does indeed get rid of the high frequency loss when the pedal is on its own, as well as helping it to work better with other pedals (my Ge Fuzz Face for example).
Unity gain for me is when the Volume knob is around 10-11 o’clock.
With the Depth knob at 0, starting with the trimpot set to 220k, I found the gain added a little to high, and ended up settling around 168k, which gave a nice clean transition between effect off and on tone-wise, with just a little bit of added warmth when on.
Experimented with R3 trimpot at 50k = Unity at about 3-4 o’clock with a weedy/tinny sound. With R3 trimpot at 400k = Unity at about 8′ o’clock with a little distortion, and with the Volume knob turned up full, is quite the overdrive pedal.
Thank you for the advice.
Kind Regards,
YummyFuzz