These stills are made of a heavy gauge copper and will last for years.. They are not designed to be a display item but functional. I agree with Mark. Three gallon is a bit small but that's what the guy wanted. 10-15 gallon can be scaled back but a 3 gallon is a 3 gallon. This 3 gallon cost $450.00..
Mark has made some big units, like 250 gallon or more. Some are in licensed restaurants and distilleries. He is planing a unit not that will have electric heating units..