The only injection system I can talk about is the one that I use. I have every size and model that is offered by bearbaits. The only safety issues that I have had are due to MY ignorance, not the design. As I have said before, there is a learning curve to these, as with anything. The way I see it, if you have a ton of plastic left over in the injector, then you need more molds or a smaller injector. The only one that I leave in the plastic to stay warm is the tips of the 2 color injector. That is only because the tips are small and cool fast. Other than that, I shoot all of the plastic in the injector into the molds or back in the pot.
On the tips coming off. If people are having the tips come off, then they are not paying attention or pushing way too hard. The tips on mine only come off when I want them to. a little common sense goes a long way. It's not brain surgery.
As far as the salt goes, it suspends just fine if you fill the mold and purge the remainder back into the pot or pan, where it can be stirred.
That is as politley as I can put it without anyone feeling like they are being attacked or put down. Hope I don't get called a cheerleader too. Jim was asking for bears customers to chime in and then they get bashed because they do. Dont quite get that one myself.