That's an excellent job, Dirk. It looks like you've put that Clan Art cantle to good use. I just put in a rather big (for me) order with them myself.

Your resolve not to use the macrolon suggests you've decided that the bag is too stiff. Is that the case? I am hoping to make one with a relatively flexible bag to facilitate getting stuff in and out.

A Comment - I note that the side gusset bends outward at the top instead of inward, making the sporran appear wider there than it should. If you want it to crease inward you might try adding a few stitches at each top corner that "persuade" the gusset to crease inward. That may reduce the effective opening size somewhat but still be very functional. If you don't like them they can always be removed. Another thing that might help is a really thin leather for the edging, like doe kidskin, and slit the edging on the inside center to encourage it to bend in the inward direction (you sew at right angle to the slit).

These are just comments, FWTW. I'd have no problem wearing that baby just the way it is now. Good Work!