I'd like to know how big to build a drum to evenly roast 1 lb of beans at a time.

Would these dimensions need to change for a perforated drum vs a solid one?

For anyone who may also be curious and stumble across this thread,

I found the dimensions for the Behmor "small grid" drum, which does 1lb of coffee at a time: 5" diameter by 9" long

I'll check my roaster tomorrow, I think it's 9" diameter not sure of length, I'd guess about 12" but I'll measure it tomorrow..