Just saw this! I love your slanty bitsa. Yes I restored a Boxer PJ535, however I moved from Thailand to Australia before I managed to figure out the electronics properly. I was attempting a vol/vol/tbx with 3 way pickup selector (as original), but with an added series/parallel switch. I couldn't get it working properly before I left the country so it is sitting in my apartment waiting for me to finish the job. I will share videos as soon as I'm back and able to get it up and running.
Good luck with the project - these basses are wonderful and should be preserved