For the Scrapmuk..

Ok now, and I mean this jokingly - I think it would look good in one of those canvas organized roll ups that has sewn various sized sections for all of your "surgical instruments" <img src="/ubbthreads/images/graemlins/wink.gif" alt="" />

Leather vs Kydex in general though. Leather has been around for about as long as we've had "tools" so I wouldn't be afraid to get it dirty. A good kydex sheath is going to hold on to/lock the knife in which means you can couple it with more mounting options - depending on the size. I think the list can go on and on with type of knife and intended use but don't forget to include the craftsman. Just started playing with Kydex myself and if a buddy approached me to make a sheath for them I'd point them to Rainwalker first unless they were just looking for a no frills cover for their edge.

T