Have you thought of taking the cover off of the 52mm spaced pickup (the actual bridge pup)? Maybe the square poles are under the cover? I'll throw this out too, somewhere I saw somebody came up with the idea to use a dremel tool with a cutting wheel and cut the solder between the cover and the baseplate so you aren't losing potting wax. Then they put the pup in a vise end to end and put a little pressure on the cover, expanding the sides out so the pup comes out easier. Just a thought. Your covers kinda don't look like they were soldered at a factory though. I guess I should tell you too, I've got 12 MMK 45's sitting here that I've pulled out. They all have brass baseplates with MMK stamped into the metal and then 45 ink-stamped under the MMK with a rectangle inkstamp around the 45 too. The wire casings (that contain the actual lead wires) are red and green. Can't remember which was which for bridge and neck. The actual lead wires are red, white and bare. Just noticed all the baseplate legs are short too. No idea if the magnafluxes woulda been done like that or not.
