I thought you all might like to see how one of my rigs is put together. This one is an IBS, but the steps are pretty much the same for all of them.
The first step, of course, is to pick your pattern and cut the leather. Some times this is easier than others (the clicker makes short work of this). I don't have dies for all of my patterns, so sometimes it has to be done by hand.
Next, the pieces are dyed, stitch patterns are marked, then all the edging and edge detail is done. It is a small step, and only takes a few minutes.
After the edges are finished, the pieces paired up, the gluing areas are marked and the contact cement is applied.
Stitching is next - the key here is to have even spacing along the edges, straight lines and smooth curves. Poor stitching ruins the aesthetics of an otherwise nice holster.
Once all the stitching is finished up, the edges along the main seam are finished up and it is off to the next step.
The wet molding is done using a dummy gun. This gets you the detail shape and tight fit.
The final step is the hand boning and finish coat. Boning is probably the most critical of all the steps. If you slip, you will crease the leather (where it's not supposed to be) and ruin the holster. This process takes a long time to master. The moisture in the leather has to be "Just Right".
BTW - here is the stitcher I use. It is a Randall Union Lockstitch. Notice the size of the Pepsi Can in comparison to the machine.
Here is 4 layers of 8 oz leather...it will easily stitch through 6 layers.

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I will never forget you Lou......February 21, 2009John Ralston
5 SHOT LEATHER, LLC - Finely Crafted Custom Handgun Leather
http://www.5ShotLeather.com