For a while now, I've imagined Hephaestus having his workshop built around the fact that he can't use his legs:
- he sits in a chair that's inside a pit and is able to travel in a circle, allowing him to travel around the perimeter of the pit, letting him touch every station.
- each station has all he needs to work there: grinding status has all his grindstones and files and a vise; he has a pile of materials with a scale for weighing; a vast collection of crucibles with a mold making area next to it; and his furnace with is manned and managed by a couple cyclops.
Once he gets a commission, he figures out what he needs, makes a master of it, wheels himself to the material section with a crucible in hand, weighs it all out, packs it, then turns to the furnace and gets that cooking while he's prepares the mold.
When it's ready, he moves back to the fire with the mold on his lap, puts the mold down, and pours.
This system does get overhauled when Greece transitions to iron; still being in a pit, but it's more compact; he just needs tongs, material, an anvil, his grinding station, and his forge. Any heavy hammering is done via Cyclops.
Any "magic metal stuff" (carbonizing, smelting, etc) os wrotten down and done off-site.