although things might have changed w the newer Behmor ,
I used an older model for several years roasting for drip for my sister.
I had a different roaster for espresso.
Im not sure what SM says about doing a full lbs on green beans on the B
its very hard to do. you would be better served doing two 1/2 lb roasts
and using the pre-heating hack found on the web.
does quite well that way.