I have had a Nesco roaster for more than a year now. The chaff collection system, although decent, certainly doesn't collect all the chaff during the roasting and cooling cycles. Alot of it remains in with the roasted coffee. I am looking at the Gene cafe roaster and the Behmor roasters to both process a little more coffee in each batch and reduce the chaff content of the finished beans. Any comments about the relative efficiency of the chaff collection systems in these two roasters as compared to the Nesco unit?