Reddit mentions of CrazyEve Leathercraft 1/2/4/6 Prong 4mm 4/25 Inch Chisel Leather Craft Tools Hole Punch Lacing Stitching Perforate

amazing work, would love to see the final full pic.
I feel like the build may have been easier if you used pricking irons rather than a hand sewing punch, it helps to keep even spacing and you can make a bunch of holes in one go. https://smile.amazon.com/CrazyEve-Leathercraft-Leather-Stitching-Perforate/dp/B00T17OULI/ref=sr_1_1?ie=UTF8&qid=1468779215&sr=8-1&keywords=pricking+iron

again, great work

I got these needles: https://www.amazon.com/gp/product/B001687P3U/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

and these punches: https://www.amazon.com/gp/product/B00T17OULI/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1

It looks good! If you have ~$20 to spend you can get a groover ( https://www.amazon.com/gp/aw/d/B074YD8DXY/ref=mp_s_a_1_5?ie=UTF8&qid=1506701984&sr=8-5&pi=AC_SX236_SY340_FMwebp_QL65&keywords=leather+working+tools&dpPl=1&dpID=51qIiFoZwYL&ref=plSrch ) and stitching prongs? I'm not sure of the technical term ( www.amazon.com/gp/aw/d/B00T17OULI/ref=mp_s_a_1_1?ie=UTF8&qid=1506702124&sr=8-1-spons&pi=AC_SX236_SY340_FMwebp_QL65&keywords=leather+stitching+punch&psc=1 )

I use these to actually punch the holes on thinner leather: https://www.amazon.com/gp/product/B00T17OULI/

For projects, you can do slightly larger bags, dop kits, etc if you go for a fabric lining, duck cloth or canvas would add good reinforcement.

Thanks so much for the response!

Hmmm maybe that's it. What do you mean by casting? Also, I wonder if my needle is too large. I find that to really get it through the holes, I need to push an awl through and the original diamond shape is somewhat lost. As far as ensuring the slant, I think I'm doing this correctly. It's hard to tell from this picture as the stitches rest in a stitching groove, but they had a slight slant, and the backend definitely looked ~ok~ (though a bit messy like you see in the picture as far as looking a bit "twisted")

I agree about the thread gauge too-- maybe it's too thick.

Thread

Needles

Punches

I used cheap stitching chisels from amazon (https://www.amazon.com/gp/product/B00T17OULI/ref=oh_aui_search_detailpage?ie=UTF8&psc=1) to punch the holes preassembly. Then glued everything and stitched it up. I don't have a small diamond awl but that would definitely make things a lot easier. I put a bunch of needles through the corner holes to keep them lined up but they naturally fell out of line (because of the outside curve vs the inside curve) so I had to back stitch one side to realign them.

Thanks for the tip!

Nobody seems to sell ones with 5 mm prong pitch, but I found them with 4 mm prong pitch.

http://www.amazon.com/CrazyEve-Leathercraft-Diamond-Stitching-Perforate/dp/B00T17OULI/ref=sr_1_fkmr1_1?ie=UTF8&qid=1449624835&sr=8-1-fkmr1&keywords=diamond+chisel+prong+pitch+5mm

Better?

Also, i'm looking into ordering this leather. 4 oz thickness seems perfect for wallets, and its sort of like the natural veg tan people recommend, but horween and cheap ($5 per square foot, about $100 for a 20 sqft hide).

http://www.maverickleathercompany.com/horween/horween-seconds/tumbled-natural-essex-finished-flesh/

This set has the same specs (2 mm prong, 4 mm prong pitch), but looks sharper?

http://www.amazon.com/gp/product/B010WGFZB0?psc=1&redirect=true&ref_=ox_sc_act_title_1&smid=A1OIS8P00XXPZL