OK, finished with the exception that I need to get two new chicken head knobs as I replaced two of the stock pots (bass and MV).
Added a presence control:
The stock Fender/Groove Tube EL84s hummed terribly. I put in a pair of Sovteks I pulled from an amp months ago, hum gone now. My friend should definitely replace all the tubes with something better though. The amp is worth it now.