I had no idea until I purchased my second pin that there are supposed to be bolts in the head of the pin bolting it down to body. Seeing this made me realize the only thing holding the top of my MNF pin is the latch on the back. What size bolts are these and where can I find them? Is there a specific name for these I have tried searching a couple of the pinball sites and have had no luck. Any help would be appreciated. Sorry if this is such a noob question but I haven't run across this problem anywhere.