Started with a pop corn maker then made a version of this "Corretto Method" then went to Hottop then to a Has Garanti 5kg then back to this set up.
I gave up my addiction to coffee for a couple of years and now getting back into it, so will probably make something like this again soon.
The picture I have included was a double paddle breadmaker and could roast 700gms with ease but the sweet spot was 650gms. The whole set up cost next to nothing and I could even use a data logger to record and repeat profiles.
Looking forward to building another but will try a variable temp heat gun this time.