I have a "gentleman's" foundry lol, I thought to call it that because its in the basement so compared to the guys with roaring big oil and gas fired furnaces in the backyard its rather diminutive, prim and proper. (I have riged ventilation as some melts can omit same nasties) Everything is investment cast using either wax, 3D resin or 3D filament patterns, nothing much bigger than your fist. The set up is a 3kg electric melter, burn out oven and a vacuum caster. I've cast AL, silver and bronze.