For this being an "ultimate Foundry" it has almost no sound while operating, the building feels somewhat lacking.

I feel like it could have a bit more of a unique niche, using loader/unloader slots (directly belt-fed ingredients and outputs), making items in massive batches (current recipe input/outputs multiplied), and depositing items onto belts via unloader as stacks (like a stack inserter/big mining drill would)

I feel like there should be a toggle to exclude the overly simple "mastered [x]" recipes, they make the building very bland, i'd rather see increasingly complicated recipes that allow for ever-more-efficient and gigantic batches of material, i'd love to see a later-game recipe that requires steam + sulfuric acid + lubricant + *calcite(space age) to make monstrously huge batches of output.