I bought one of these years ago (last Century in fact). They are lovely guitars for the money and it had been lying around for a while so I decided to have some fun. First of all a new blue paint job then some new pickups....
...and a lot of switches.
I replaced the neck single coil with a humbucker I had lying around and then fitted a push/pull pot (tone), two position DPDT, three position DPDT as well as the stock 5 way. This gives a total number of 50 combinations! Once you take out all the duplicates you get 27 unique settings.
Some are fairly unusable but the "all pickups is series" setting is a blast ?