This setup should be standard - allows one to remove most of the electronics easily. All my other guitars have everything hidden beneath a big pick guard, under the strings. Maybe a Les Paul is required here, then I can get to the back of the pots.
This guitar allows me to play around with tone capacitors and treble bleeds without having to remove strings, fifteen screws, unsoldering the output jack, and such fun. In and out in minutes.
Here is the inside of the "module". That coloured capacitor was the tone capacitor. It shows the guitar's age, and resulted in much googling to find the value as .047 microFarad. To my surprise, the log taper potentiometers are 100K. Would the "standard" 500K make any difference? And the two potentiometers are not the same number, both 100K LOG, but different numbers.
I spent hours salvaging capacitors and resistors from old junk, before finally junking it. I replaced the tone capacitor with this .015 microFarad (? It does not follow the numbering system of 153, and is too large to be picoFarad?) Guitar is much brighter now.
The treble bleed circuit is the "Kinman" style, a 2 nanoFarad capacitor with a 22 K resistor. I find the "Fender" style to have better volume spread at low settings, and cannot really say which style has the better volume taper. I have tried a 1 nanoFarad capacitor with a 100K resistor in series as here, as well as those in parallel, with a 10K resistor in series to that. If I had a bigger variety of components, I could play around some more, to fine-tune values and setup. At least this gives me a rough idea of what happens. Now, to upgrade to one volume pot, two tone pots. But, the CTS style pots have a bigger diameter, and might not fit in quite so easily.
Your input as to whether 500K pots will be better, and favoured tone capacitor and treble bleed style and component values for humbuckers please?