Been passing this forum too long.
I did not make a cover but have bought and installed 2 CCS covers, on Wenonah Moccassin and Advantage. Modified the 1/8 inch rivet head by grinding it to a cone so it fits inside the snap.
3/8 inch rivets worked on my Kevlar UL hull with a backing washer. You may need longer depending on the backup washer used.
24 snaps, 14 front section 10 rear section.
butthead