I've only just joined and thought I'd start by contributing this link to a great 1950s film on sporran making. It illustrates a lot of tricks of the trade that anyone lacking a background in leatherworking may find revelatory!

Sadly there's no sound but there are some captions...

http://ssa.nls.uk/film.cfm?fid=0958

Please excuse me if this is old news...

R