Welcome to the Do-It forums Chameleon.
I putz with making sing cavity molds, mostly hand pour numbers and have some success but if I want great baits, I inject them in cut molds. The fry series of molds that Do-It offers are the easiest of the easiest to inject and consistently hand you super quality baits. The fry series molds also are super simple to manipulate to get a whole world of color options and for what they deliver the fry series molds are not that spendy.
I understand the idea behind making the mold and the baits from it but I also know of the other side to the coin and the flops that precede any kind of success. I've done plaster of paris, alumilite, and several different brands of silicone [rtv] and nothing can compare to the cut injection molds.