Brokennock said:
It's not just the stretch issue and sewing the cloth to the leather. Cutting straps evenly and squarely seems to escape me. I've tried using a metal yardstick as a guide but the leather seems to move along the length and comes out wonky even though I followed the edge. Some type of ultra-sharp roller cutter, like a pizza wheel might be good.
Has anyone tried cutting a wider than needed strip of leather, not worrying about squareness or the weird edges one gets with scissors, rolling it up and then slicing the ends off the roll, leaving the middle the desired strap width? Not sure if I explained that idea as I see it in my head.
If you did that with "stretchy" leather, I'm pretty sure the center of the roll would squeeze out as you tried to cut it and then it would be less wide in the center than in the outer part of the roll or maybe vice versa.
Part of the problem you are having may be about the surface you are laying the leather down on to cut it. If that surface is too smooth, the leather has more of a tendency to move around on you while you try to mark it and especially when you cut it.
I have found the best cutting surface for me is a piece of plywood that is free from knots and thus the surface is pretty flat, but is a bit rough. That helps keep it from moving around/sliding/slipping on me as the leather sort of sticks to the rough surface better. You do have to choose your plywood carefully or pay a higher price for plywood without knots on at least one side, but I have found it well worth it.
Something else I do on thin/stretchy leather is I don't cut it with a knife, but rather a sharp pair of heavy duty scissors/shears. I mark it with a very thin point permanent black magic marker or black ink pen and metal yardstick on the plywood, then take it off the plywood and cut it with the scissors/shears closer to my eyes. I can then cut just inside the black line, so it doesn't show up later. Of course if I'm going to dye the leather black, then I just cut down the center of the line.
Gus
P.S. Before I was able to afford anything other than handsaws, I bought plywood for leather cutting and paid them to cut it into shapes I could better use at Home Depot, etc. I then just filed/sanded the cut edges so I wouldn't get splinters in my hands when using the pieces. I would have them cut a long piece a couple feet wide or more to cut straps and other pieces into rectangles or squares I could use on a table top or even on my lap.