Payment asked, "Tell me more about using it. Is it available as an electric model?" The smaller USRC is not available in an electric model. You can check their website out. It has gas control and fan control. The program is in your head, just the way I like it on this small of a roaster (1 pound). I added a timer and a notebook. I have developed about 5 profiles that work very well based on time, temperature, fan speed, and gas pressure. It has a very nice Watlow temp. probe in the bean mass, so you can accurately monitor the profile. Beyond these basics, I think I would be writing a roasting manual. In summery. it is a very repeatable roaster, and very easy to use. It has a lot of flexibility, and produced awesome coffee. I couldn't ask for much more. For home use, and my small group of people who I give or sell coffee to it has plenty of capacity. I roast half pound and one pound roasts. Having roasted on a 5K roaster and a 12K as well as a 24K, once you move up to dealing with that much bean mass, you may be better off with some type of electronic profile controls. However the 12k I worked with didn't have any more control than the one pound roaster I now have, and I was able to do a good job as well.
Les