I'm upgrading all the electronics on my Jay Turser 335 knockoff. I bought a new DiMarzio PAF 36th Anniv. from Musician's Friend and just went to mount it in the ring. I can't get any of the four supplied mounting screws ( 2 phillips head or two straight slot) to thread into the holes in the legs?? I assume those holes should be threaded, right? Looking with the magnifier I can't see any threads, and no matter how I try to screw the screw in, it just sits on the hole and doesn't "bite". I'm suspecting they forgot to tap the holes, but this is my first time mountin a humbucker, so I just wanted to get a second opinion before I contact DiMarzio. Thanks guys!