Thanks O-L. Agree with all your points. This recipe reversible and cheap for situations were you can not use metal to transport the heat. I found I needed something for my 3 18650 DST with the trim potted TR-3T6 driver. There was just way to much going on with that driver to use metal for heat sinking. The driver was getting so hot that it kept unsoldering the LED wires. It may be of little added benefit, but sometimes a couple degrees is all you need.