sporran mold

[grizzbass]

I am making a wet molded front piece and then sew it on a back piece which I have cut out and will use the front to trim it to size.
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I'm bundled a bit because aftewr 25 years in California apparently I've become a californian. I actually think it cold today (38 and raining) The leather is just regular veggi tan medium thickness.
I agree totally on the saws and wood but don't own and don't have access to those or the sander to smooth out the round edges.
This is one of the two I've done before.
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I guess I'm still unclear on what you're trying to do with the mold. Are you constructing the entire sporran and then inserting the mold into it for wet-forming to a final shape? Or just trying to tighten up the seam folds?

What kind of leather do you intend to use? Certain tanning processes aren't very conducive to wet-forming.

Just generally speaking, if I were going to build a mold for a completed sporran shape, I would probably just cut it out of a solid block of wood. Or layer plywood pieces with glue to build up the thickness, and then trim the whole thing to shape with a jigsaw, router the edges, and sand it smooth. Then I'd cut it in half, removing some of the centre material so that there's a gap. This would be for an adjustment on the width of the mold, either using double-threaded studs, wedges, or similar. That way, when it is inserted into the sporran it can be spread apart (much like a hat stretcher) to the final dimension you want your sporran to achieve. Let the leather dry, then collapse the mold and remove it. This would be fairly simple to do; it just requires you to size it for your specific sporran design.