I'm not aware of a "tutorial". I jsut sort of worked it out from scouring the internet. Learned a lot by reading about how leather armorers make their molded armor. It's basically just soaking the leather, molding it around the knife and letting it dry. Some use water, others use alcohol and probably other liquids for soaking. Armorers will bake the leather in the oven to make it harder.

This is the one I made (on right) to replace the stock sheath (on left) that came with my top-heavy Officers sgian dubh.


and how it stays open for easy draw and return without slashing me or my hose