I picked this idea up on another gun sight, and it works great. For using the harder lubes in the Lyman lube/sizer with a heater, I was constantly plugging and unplugging the heater. The idea was a simple 600-watt, rheostat at the hardware store. I wired it into a double box with the receptacle and it works great. Turn it up to get the lube warm. Then turn it down half way, and you donít have to mess with it.