no not too difficult I made a press with foam from Knifekits.com...you just heat up the kydex in your oven or a toaster oven and put it in the press with the gun and crank it down...you do have to make paths for the light or you can't get it out of the holster. I had a few problems getting the kydex to stay straight on the gun when I put the top of the press on but I got it after a few tries.