Just curious.. for you guys that have done USCT frame connectors.. how much grinding on them did you have to do to get them to fit? I feel like i'm having to do more than i thought i would.. like a hours worth and in and out 10-15 times to get them close.. also, the front of the connector is about 3/8" lower than the frame in the front, just making sure that's normal and not supposed to be perfectly even