I hope this is useful for someone. I use Leathercraft CAD is a free CAD software specifically designed for leathercraft pattern drawing. It’s being developed by a single developer out of Japan – Luthier TN. This is mainly my process on making a pattern – from drawing it, to turning it into a possible mockup, and finally doing it – https://www.youtube.com/watch?v=Q1Hb_7nwHD4

I added the template for download under the Western Wallet section. I’ll link to it in the comment section 🙂