oldpeanut
Contributor
Actually, I needed no Dremel tool in this case - the buckles are mare from some pretty hard plastic so that twisting the buckle on the post takes care of the index notch quite easily. I wear size 10 boots and I believe L size fin pockets - following LP recommendation I got size M strap. If I put it over the heel or just above it actually feels quite comfortable but I can probably overstretch the spring if I pull it off by a rubber piece.
Size Large spring strap is just one inch longer than the M size. Personally I prefer to have spring strap had no strech at all when the fins are put on my feet. In this case, it would be much easier to don and doff the fins.