My brother in law asked me to replicate this nylon sheath into leather. I told him I know nothing about knives or sheaths but I would try. He wants to keep the pocket also. One question is weight of leather and type of leather to use and what will protect the stitching with him pulling the knife in and out of the sheath? Being that the original is flexible what problems will I have making a leather sheath? The size is roughly 16"L x 3 1/2" wide. Thanks all