I am not sure how yo would do a floppy rest without gluing a piece of leather or using a grip wrap. I don't wrap my grips either, but I usually shoot off the knuckles. Glue doesn't like to stick to my oil finishes, so at one point I used a commercial flipper rest and had to hold it on the bow with grip tape, like you would put on a tennis racket. Ugly, but effective. I once made a rawhide flipper and strike plate that was essentially a 1" wide band of rawhide, wrwpped entirely around the handle and glued to itself. I made a 1/4" wide spur by leaving a rounded bulge the bottom edge, about 1" long and 1/4" wide, then slicing front to back along the straight edge of the band about 5/8" deep. I soaked the rawhide, placed the band on the handle with some Titebond II, with the spur positioned to be the rest, and trimmed the ends of the band to overlap over the front of the bow and held it down with tape. I bent the spur out and trained a slight forward curve into it then left it to dry. I fooled with it every day as it dried to maintain the desired shape as it dried. When dry, I sanded it down and oiled it. That bow is long gone and ai never got any pictures, but I'll try to sketch something up to make it clearer.
Julian