First of all, thanks for the reply!
It seems quite an interesting board, think I’ll might give it a try.
What I was searching for is just a simple one-pot tone control just to be able to unleash the full potential of this little gem of pedal.
Well, this sounds a bit pretentious, but I think u’ve got the idea 😀
Looking at the schematic I see a 100nF cap, which I know being a common value for guitar. Maybe a switch for a different (bigger= bassier?) value?