Scott, I'm coming into the middle of this super thread so my apologies in advance if this has already been discussed.

The old MoD cantles have little protrusions on the inside over which holes in the leather of the sporran fits. These don't appear on the face and do allow for considerable adjustment on the inside for the maker.

Without going further (and I can take/post pics if you wish), do you know what I am referring to?

Rex