Basshunter, heat can be a friend or foe. I personally use heat on EVERYTHING, some refuse to heat molds,injectors and so on. It basically comes down to what you are comfortable with. I have heated my cups for hours on end on the griddle then tossed them right back in the micro then back to the griddle. If you plan to produce a large amount of multi color baits without a machine of some sort your either going to keep the cups warm or have a ton of plastic to cut lol. I will always give any tips to help others but it is always a preferance, some things may not work for others or as well. Some things I can't do without heat, my skinny vein baits for example. Without heat I could not make them possible.
Drew