Bruce, the last one I help set up was for Terry Goodman, when we took the boot and plate out of the box mounted it on hes ski. the boot was loose so we moved the heel piece forward one hole, the heel piece should be hard to pull up, not just a slight resistents  like reflex says. Terry is 195-200 6'3" he is on a 5 din setting. I have also seen Bondo on the plate put a small amount of bondo in the heel area then put sun screen on the bottom of the boot, put boot into binding let dry. I think that is a andy maple trick.  We do not use bondo, And have never had a prerelease, and always released when need. Deano