Im a little lost. I loosened all 4 bolts and took measurements at 3,6,9, & 12 o'clock all while trying to hold the couplers together. My gap was uniformly way bigger than .005 at all points. In fact it was big enough to fit the biggest feeler through. Should I be checking the gap with the bolts tightened to get more accurate numbers? Im supposed to be running the feeler gauage through the gap between couplers correct?