thanks everyone, All I do for the multi colors is shoot the whole bait a color, cut the color you want off put it back in the mold shoot the whole bait again and the hot plastic bonds the cold plastic. it you want more colors you just keep cutting remold and reshoot. It takes time but its fun and looks cool. Yes its a Jacob's mold. I love it! I shoot it with a Bears two color injector,But most of the time I only use one injector at a time. I would encourage everyone to do this. It is truely a blast.