I spoke to Lynn Park today and mentiond that this problem was being discussed on the site. He said to be sure that the hex wrench is fully seated into the nut before applying the torque. He said it was only necessary to leave the stud long enough to engage all of the threads in the nut. Appearantly there are some who are screwing the nuts onto a full length stud which then limits how deep the hex wrench goes it the nut before it is tightened, (makes sense). It would also benefit everyone to be sure the countersink angle in the threaded adapter hat is the same as the chamfer on the nuts, I thought mine were 90 degree included angle and they turned out to be 60 degree angle, use some bluing compund to check the fit. So,...... for what it's worth......CHECK YOUR NUTS
.....Rick