I purchased an Air Wing Luggage rack and light kit yesterday. I go to put it on my Ultra Classic. Get everything set up. The hollow hex screw doesn't seem to fit in the luggage rack support mount. It will not seat to the threads. Anyone had this problem? Will the silicon help at all? I'm sure I'm attempting to screw the bolt into the correct rack mount support. It looks as if the rack mount support isn't machined all the way so the bolt will catch on the threads. Driving me crazy considering the cost of the rack and light kit!!! Any help much appreciated.