I use a drum that works on my BBQ with a modified rotisserie bracket and motor that spins at 60 rpm. It does 5lbs at a time, and I've been doing it for 3 years. I agree that the results are much better and for much less $$, and with this setup I can have a batch done within 20 minutes, including warm-up time. I find that it takes about 11-13 minutes to get to first crack, then another 2-3 minutes to full city, which is what I prefer. You also need to let the beans outgass for a day or two to develop full flavor.