second the yes to chaff collector unless you roast on the porch & just direct the exhaust to the mulch/compost, or just like chaff all over the place. just got through the first few roasts on my unit & so far so good. the control for the fan on this unit is the bottom variable switch on the control panel and doesn't actually start the fan until set at around 25-30%, on the 100% setting it seems it could be be quite capable of stalling a roast Have been finding that even with minimal fan getting the unit thoroughly warmed up takes a little longer than BF's, not sure if this is actually the case. So far it seems the full 1000gm batches are a bit slow (for my liking) by current methodology. 700-800 works really nicely, mileage may vary as i haven't played much with drop in temps. no scorching or tipping on the beans but the cooling tray agitators do crunch up a few of the beans, no biggie really need to hook up new bean mass & environmental probes for roastlogger, (i'd like to get a unlogged analog one near the exhaust too), not that the one on the machine isn't ok, but to get a better idea of what's going on within the system. the one on the unit seems to be not quite environmental, not quite been mass, somewhere in between. still trying to work out a routine that is easily repeatable, will update when things are a little clearer. best of luck with the new roaster!