I believe we've met actually, did you have foxy brown in Northcote? I was friends with one of the baristas, I'm from hawke's bay if that jogs the memory. I have a bfc dual boiler, currently paired with a robur. I've been through single boilers & commercial machines but I think the bfc will stay for a long while. Also have a moccamaster, hario syphon, chemex etc you could say I'm a bit of a nut!
Roasting on a correto,using a Bosch gun and breville big loaf, I'm pushing 1kg roasts, but can also go as low as 600g.(maybe lower, never tried). Have considered building a kkto but, irrational as it sounds, I don't want to learn a new roasting process.