Brenn,
Nice rig! I have a rig with holsters of this design (El Dorado pattern by Mr. Ghormley). I really like it, too.
I made it for a 5-1/2" length SAA/Ruger NMV. I use it both on my 4-3/4" and 5-1/2" bbl revolvers.
I agree...it is a lot of stitching for a liner! It took me a long time as well to do by hand. But, I'm am pleased with the function, and consider it worth the time invested!
"I'm going to file off those little bumps on the end of my barrels. They keep getting in my way, and I can't see the target"
... Good Troy