Supersonics/Prosonics

Has anyone taken a look inside one of the Supersonics or old Prosonics? Or seen the schematics. I want to either eventually either have one modded or have a similar amp built and want to know how hard it is to split the overdrive into the two separate "burn" channels. For some reason I just think that is the coolest thing. I'm sure its probably useless in the long run but I like it.

I can't help you with any of your questions but I've played through one of the supersonics 22 and it really had sweet tones..I would imagine its all PCB integrated..

I'm sure the Supersonics are PCB mounted. Not sure about the older Prosonics. I've tried the supers out a couple times and liked it but it didn't have enough gain.

All of the FEnder Pro SEries amps are PCB construction. They and the REissues are built on better PCB's than the Hot Rod and Blue SEries of Fenders.
IN the PRo SEries and the REissues, the front controls and jacks are mounted on their own board/s. There is a main PCB that sits in the middle of the chassis...much in the same manner as do the tagboards in the vintage handwired FEnders. The tubes are chassis mounted whereas the HTO Rod and Blue Series of FEnders have tubes mounted into the PCB.
These amps are single channel amps and stack gain stages to achieve the different levels of gain.