One tip on the Twinjector, dont keep things tight. The top bar a little loose and the top of the tubes loose. Aluminium is not by for the best material for this but it is afordable. Kevin does hone the tubes but when you put two next to each other ther is just to much rubbing of aluminium to be smooth. I have a set that have linear bearings at the top and stainless rods, what a big differance. But the price, I will just leave it at that. And it is a Twinjector too. Jims thing about leaving plastic over night is the best idea of all. Overtime it will smooth out. The beat temp for laminates is as low as you can shoot. And I am talking about 290-310. Swirling comes from to high of a temp. Try it and see let the temps start out high and let them drop while you work. Just before you cant shoot it will be the best laminates. I have to heat my plastic and let it cool for some colors. Frank