Hi. I’ve seen all the tutorials and read some of the posts on stitching, and have hand stitched several holsters. But now I’m getting ready to start on my thickest project. A cross draw holster for a 1847 Colt Walker. It’s 4.4 mm thick or 11-12. Plus a welt at the trigger area. How in the blazes do I get an awl through all of that? Thanks for all your help.