It is really easy, I have been making my own tubes, lizards, and beavers now for about four months. You need to find something to do to keep busy during the non fishing months up here in VT. The only thing with reheating old plastics is the odor. For some reason when you reheat old plastics, made originally by a name brand, the odor tends to be much worse than when you are just making them from scratch, so make sure you are in a well ventilated area. Reheating old plastics also requires a much hotter temperature to be ready to pour than new plastic out of the bottle. Feel free to ask me any questions, as I have made all the errors and am now pretty good at it.