if you do buy a 2 color injector may I suggest bass tackle it is a very good tool I do have one but the one I have I do not like I do some work like the above but I use aluminum plates and shoot half then put the mold back together and shoot your second just make sure that you use aluminum plates to go up again sure mold that they are absolutely clean or when you put they molds together to shoot your second they may not stick together I found this out the hard way. I either use acetone or alcohol to clean with it will deftly take all degrees and grime off. A I'm giving away my secret all well that's what I'm here for.