my best selling summer bait is a 10in curl tail that i make in a custom rtv mold. there is not a thing wrong with them. just takes a little time to get the hang of hand pouring in a open mold. use a small pirex cup to start. a cheap micro wave and a few differant size pirex cups will get you pouring. to make cnc molds and injactors you need about a 100,000 dollar cnc machine. but there may be cheaper ones not sure.