I thought that the temp needed to be like 100 or 105, but then again I am sure once you hit the sweet spot temperature you will be set.
I have a piece of aluminum plate that I am getting cut. Will put a small square under the luber with a longer one right on top of the smaller square. Once all is bolted down, I plan on putting a small travel iron on the plate until the Carnuba Red is at the right temperature. I am sure I will need to experiment a whole lot more than you to get mine consistent.
I also use the travel iron to preheat my molds, so it serves a dual purpose.