I have been playing around with JP saddle collection sheets. Here is a field note cover that I made. The stuff is really floppy to sew, and I think I need to increase the power a bit on the engrave (settings are somewhere on the forum).
I used a few magnets to it closed. I freehanded the fold and just put a few books on it overnight. If I had snapmarks I word have scored the fold a bit.
Nice! That stuff looks just like the black pigskin lining leather I got at Tandy Leather. It was floppy as well. Not really good for most leather projects but I used it for Moleskine covers and it worked great for that.