So I saw a knifemaker's site with beautiful knives and he had interesting sheaths for them that were basically a wooden body with a leather top or collar warp around the handle. Thought I'd play with something similar. I have a small fillet knife that needs new sheath, so here's what I've come up with so far. Made the body with some scraps of purpleheart or wenge and "welt" of contrasting oak. Plan to sew or lace the open edge, and glue the leather to the wood with maybe Barge cement. Not sure about a mechanical connection between the two... hmm.