Thanks Kevin.

I have a heat box for resin, a simple 60W bulb in a box with the resin. This keeps the temperature of the resin surprisingly stable.

The propane unit you use, is there any open flame there? I would not be comfortable with open flame in my workshop, and a thermostat would be nice. Preferably not running on electricity for its main energy consumption <img src="http://www.catsailor.com/forums/images/graemlins/smile.gif" alt="" />
I know I am asking for something which might not be out there.. Sorry.