Usually these pre’s get the power from the Power Pak slave amps, this one has been modified for independence.
Needs a fair bit of tidying up, blu tak is not a suitable substance for securing caps:
Might upgrade to melt glue. Securing lots of other fasteners to do and cleaning.
All the fun of finding how to bond fingerboard to them without it coming off with temperature change. Probably flexible epoxy. I suspect the reason the slots for the wood inserts are round at the bottom was these were intended to go without them, it makes it a pain to fit the inserts, and now I’m holding them, seems to make sense without, probably upset traditionalist instrument players though.