I took an interest in making my own holsters when I saw the expense and lead times of those commercially available. I decided to see if I could make my own. I used 0.060 ABS plastic instead of Kydex. I bought a 4' x 8' sheet for $38.00 locally. Takes a bit more heat to work with but it's basically the same as Kydex. The leather lining on this holster is 2 oz Herman oak. I had to experiment with adhesives, but I think I've found one that works. More on that later. I did glue the leather before I formed it to the gun. I used a homemade vacuum press to form the ABS to the gun. I'll try to get some photo's of that behemoth later. The leather backing is 6 to 7 oz vegetable tanned. I did not dye this one but I burnished the edges with Gum Tragancanth and treated the leather with Fiebings Tan-Kote. The fasteners were found at a local hardware store. I chose the metal clips from Tandy for their cost and availability. There are 1/8" rubber washers between the leather and the clips to provide room for tucking.
Here is my very first attempt. It is a hybrid design for my Sig P238. I don't care much for the color of the fasteners, but who's going to see them!

Retention is great and the draw is very quiet.

This photo shows the leather lining.

Here's the back. The t-nuts are flush and you can't feel them at all.

Hope to see some of the holsters the rest of you are making.
I have made a hybrid mag holder that I will photograph later. Anyone know how many photos I can upload to photobucket on the free plan?