Cooling the beans is easy. Cooling the beans and collecting all the chaff is a bit more difficult...
My prototype chaff cyclone was disconnected the other night when I roasted 26 batches by TurboCrazy (it was way too windy for the drum). I tracked so much chaff into the house that MrsBW actually chewed me out, which rarely happens as she is pretty thick-skinned about the whole coffee thing. Most of the chaff actually fell off of my body, and wasn't carried in by my feet. I was using my 5 gallon bucket with the spatter screen and stove vent fan, which will normally cool a 20oz batch in under a minute, but the hood with the line to the cyclone and the shopvac was off so the roasting shed took a good dusting of chaff over the course of the evening. I forgot how bad that used to get before I set up the cyclone.