Been dabbling with smoking for a few years on a Brinkman cheapy. I just started my first build of a RF smoker and came across this site. I find myself in a quandary because I have designed my smoker using Feldon's Calculator and I now find that those numbers may not be correct. See my post at http://www.smokingmeatforums.com/t/161795/is-feldons-calculator-really-flawed.
Anyway, its nice to find this site.