I have been making "rifle grips" for the AR www.RifleGrip.com and make my grip molds from silcone. When making the molds I have some left-over silicone, so I just carved a piece of wood into that shape and covered it with left-over silicone. Then when I have left-over resin..use it on the mold. Definitely not high tech..but I get to use leftover material "when I have extra".
The resin is hard..but a flexible resin is available.
Ed
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