I used to pour my own baits but only used open pour molds. Some of my molds were the silicone molds and some top pour aluminum molds. I always had trouble with baits getting memory or plastic burning. I have a idea for a worm and want to be able to mass produce them using injection molds. I think I was told that the plastic we use to make baits it different than the big manufactures. Why do they use different plastic ? Will injection molding solve the memory problem ? The way I was making baits in the past was very labor intensive for just a few baits.