I have some answers and it's looking promising. No PCB's in here.
I found Philips screwdriver and had the back plate off. I later scattered the screws around the room when I got in bed.
The spunky little balsa wood Spector is a passive analogue device, but alas, it has been visited by the Solder Butcher.
As seen in the image, the solder balls are created with a 40w soldering iron and 30 to 40 minuets of heat applied to the pot casing.
If done skilfully it can create exactly the right conditions to ruin the pot. and prevent a good electrical contact.
Still. This is all good. I have a preamp in the TB-70 but don't use it, that is, it stays set in the middle notches. I set the tone with an amp, just working to help it's natural sound, not processing into something new.
I might turn the treble down for a dull thumb sound, but that's rare.
I understand a bit about this passive setup and am going to enjoy fixing it, making all the signal paths strong, extra shielding, and military spec wiring quality, as I imagine it would be.
Whenever I buy pots on the net I don't get the nice ones.
Can anyone tell me please where I might get those nice high quality pots with ballistic grade sweat and cigarette ash IP protection?