Jim-
I read your topic and have been pouring worms, senko's, etc for quite a while like you are talking. I had a couple pots made that have a steel plate basically, welded down the middle. I wanted to make red shad, and this was a way I thought would work best for hand pouring. When pouring, the colors go into the mold side-by-side (they start off separate, but by the time they hit the mold they've come together), but also 'blend' / 'swirl' or 'mix', whatever you want to call it. They come out great, and I can't make enough of these worms I make. I've done several other colors, such as bama bug, a green shad, blue shad, black shad (black & pearl white) just to name a few, possibilities are endless. Anyway, I think it's a little different than the 'big boys' laminates, and I can attest they catch the hell out of fish! Plus, custom hand pours that are different than anything else out there, catches fisherman as well as fish............just my 2 cents on your topic.
Ed