on making a holster, make your patterns, sew it up, put your gun in a plastic bag (a good one),
wet your new holster good. Best way is to put it in the sink and fill it till the holster is under water.
When it quits bubbling its wet through. Then put your bagged gun in the holster.
and put the works in one of those vacume baggers and draw a vacume on it.
That will form the holster to the gun. Give it a few minutes then take it out, and carefully remove
the gun from the still wet holster. Hang the holster to dry.
(or if you know you have your gun well protected let it dry in the sun with the gun in it)