Had my machine now for about 3 weeks. The Slimer mech would only count shots that were straight on for the most part and that wasn't bad. Last night for some reason, it wasn't even registering those. It had to be the perfect shot. I took off the top cover plate on Slimer, loosened the 2 nuts under it, moved the black block to the middle of the ovaled out holes, tightened the nuts to hold it in place, and installed the cover back on. It loosened up Slimer and now it registers pretty much any hit on Slimer. Thought I would share in case anybody else has this problem. Mine was a NIB purchase, so it has the updated Slimer mech on it.