Hey, new here and just making my first leather sheath. My question is regarding making the holes for stitching. initially I used a laser to cuz out a pattern, then made .03 in. holes to line up during glueing. Of course I then found out how much of a pain it was to try and glue up a sheath with pre-done holes and make each side of the sheath and the welt perfectly.
My new plan is to just cut out the sheath shape and welt and line the edges up as good as I can and glue up using contact cement. I'll then use pricking irons to make the holes all the way through.
My question is regarding the sizes of pricking irons. I ordered .8 mm tiger thread and I ordered 0,00,000 harness needles (the cheap ones kept breaking) but I don't know how to size the actual "pricks" of the pricking irons. I like the look of about 6 holes per inch which is what I used in my CAD drawing. My other concern besides holes per inch is the actual hole size left over for ease of threading. All the videos I watch the people just do it by hand for the most part, I know my holes aren't perfect but they still around only off about maybe 10% and I'm having a hard time getting the needles through easily. Thank you in advance.
I bought these in 4mm. Is this the proper size or should I get bigger?
https://www.amazon.com/gp/product/B014549SNG/ref=oh_aui_detailpage_o08_s00?ie=UTF8&psc=1