Hello. I'm putting together a plastic bender, using a Vulcan strip heater which supposedly draws 150 A to output 1200˚ (@8"long). That amperage seems a bit low, but them's the specs. I'd like to use a variable controller with it for lower temperatures, as well as leave headroom for a longer, higher-power strip heater. If that's a reasonable hope, what should I look for, either brand and model, or just specifications?