Most of what i have done to the Behmor is here - PID, smoke control, higher RPM drum etc. - is here:
Modding the behmorI had read a lot and talked to some commercial and semi-commercial roasters before I got a Nesco. It died in 80 or 100 roasts and I got the Behmor. I think that I had a consistently drinkable roast on a single blend in 15-20 roast cycles. For my needs, I buy larger bags (100lbs +/-) of a single bean or blend and roast it for 2-4 months. It was much too hard for my brain to wrap around all of the variables on changing the beans frequently. I am 14 months and 300+ roast cycles into the Behmor now.
The PID could give me all kinds of control over the roast but I would need to track great amounts of data and run green loads smaller than 320g. I have two notebooks full of information tracking every single roast that I have done for 6 data points already and since we consume almost 1kg of roasted beans per week - I "need" the output. I roast to a Full City + level, exclusively for espresso on two set-ups that I know well. As a system, it is working well for our needs.
If you have a way to vent the smoke effectively, you can punt the afterburner. It needs cleaning and takes some of the juice that you need for the elements.
WES