The entire Rage Tail line is covered under a VERY good utility patent. Design makes no difference with it, it's the ridge on the edge of the appendage that is patented.
It isn't plastisol, but a TPE, my understanding is our liquid pigments/dyes for plastisol are not compatible with it. That said, I haven't used it, just done a lot of research into the material over the years
Every supply company selling glitter to the bait hobbyists is selling the same glitter from the same 2 manufacturers I've found. Like I've told you in the past if you want to continue to buy that same high temp poly glitter you bought from Baitjunkys just head to LureWorks
Food for thought, I have a barely used BT twin thats bent to hell. Also have an old Bear's (Do It's are identical) that had been modded with a locking pin that broke.
Back to work.......
I am well aware of how they're built. My point being the thin wall of the Do It injector won't hold the tip that well, especially if any kind of pressure gets applied to it while injecting or evacuating the injector.
Problem with the Do It injectors is they use a real thin wall aluminum tube, they won't hold the tip/pin very well. BT's injectors use a very thick wall aluminum so they hold everything properly.
Before Ultramold sold direct they sold through Bear's Baits and released the bench top injection machine you see here (first with pressure pots, later later with the mixers you see here when they had problems with salt) It will only work with their molds (hinged with the injector port at one end) from what I remember. if you get him to send the rest good luck with it
They appear to be a pair of Diaphragm pumps and a pair of heat exchangers (just a small piece of the puzzle on an injection machine)
Would need to see more detailed pictures of everything to get a better idea.
It's dyed after the fact guys. According to one of their manufacturers Creme would get the worms injected in a bone colour and create the colour after they received them. If they were injected the final colour the head wouldn't be a solid colour, you would see the tail colour through the centre of it.