I am new to making sheaths, and I need some help. A friend of mine has started making knives and I am going to make some sheaths for him. I do upholstery work, but never made a sheath. So, could someone please help me get started with what leather to use and just the basics of building it. I hope this doesn't make me sound to dumb, but I have a mental block and I can't seem to get started. Thanks!