
This unit arrived with an obviously defective part: the piston design includes two pins that should go in a bayonet connection with the injector assembly. There are no pens; The holes for receiving these pins are clearly visible. Thus the plunger is held in place only by the friction of the plastic on the plastic, i.e. nothing. Since empty pinholes are hard to miss, someone on the team that assembled them knew they were shipping a defective product. I doubt the rest of the combined parts will last long enough to go through a full resin supply and I can't imagine anyone using this in a commercial setting, at least not in an industrial economy. I'm afraid this is one of the increasing number of amateur tools and kits on the market designed to look like a professional system that costs a lot more. I had to go with one of the $10 disposables as they have worked well in the past. This Rockpro is going to the junkyard because its first plastic part, the piston part, broke during use.

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