Michael, I have had this happen several times. It seems to be a case of being VERY experienced with the nuances and feel of guiding that last little edge of insert into the bezel. I tried the “edge of the table” trick and couldn’t do it. I actually had to mail it to a friend and he inserted it in a NY second! But I do hear that using a pair of nylon tipped pliers can easily guide the last edge into the bezel. With these inserts upwards of $2-3k USD it’s scary to take a chance. Good luck.