So I had to cut into the electronics cavity to pull this off. I still have a bit of the cavity and one hole left. I'm thinking of putting the pots in line with the existing hole and trying to use what little cavity I have left. Doable? Recommendations?
Figure out the controls you want and then make them fit. Don't make less-functional wiring because you don't want to enlarge a cavity.
It all depends on what you want. If you go passive you might be able to squeeze volume & blend into what’s there if you use the battery box to. Maybe a tone also.