They are expensive. But I hate idea of shelling out cash for an afterburner, when it won't add to my production capability and cost more $$ ongoing.
RE; Equator Coffee, I think they have 4 smart roasters.
I've called the company and spoken with (Mark?). According to him, because the thing burns so clean, you never have to clean your stack. My little 35 pounder has 2 stacks, and I'm gonna scrub them out this weekend. Not the worst job ever. But...
'cides, it's a sexy looking machine - which is essential in a coffee roaster.