I like the bags you chose; they just violate my "how cheap can I actually make this project and still have it work well" philosophy. I almost went with a couple of the old style canvas M17 gas mask carriers, but these things were actually cheaper. The upside to the old canvas carriers would have been that they'd been easier to dye. Years ago, I taught myself to make holsters and gunbelts because I thought it was outrageous that Galco wanted 120 bucks for a shoulder holster LOL.
The kind of sewing I do is very easy. No fancy lock stitches or anything; just go through the material from one side, then go back to the other side, all in a (relatively) straight line. When you get to the end, go back to the beginning while poking the needle through the holes you already made. I learned to sew because I don't throw away jeans when they get a hole in them. My family members find this to be hilarious.
I'd love to see the project when it's done; I'm always interested in how other guys go about making stuff.
"No matter where you go, there you are."