I have one of these on its way to me and it is a 1979 and it has the circuit board assembly in the pot cavity. I am not familiar with these but the application seems obvious enough to me, just curious why? Is there some reason Tokai did this? I cannot think of any practical purpose for them as the wiring is pretty simple. My recent OBG purchase was a complete screw-job and that guitar will be headed back to Japan on Friday... I am an absolute idiot for buying it but my desire for these MIJ Les Pauls is overwhelming and I have no control of myself sometimes. I hope this ls50 is more pleasing and the seller seems very honest.