I love the concept of high-end refining blocks being tied to windmills, and my sawmill is my proudest (and most satisfying to use) building in my little town. But I feel like there's something missing... While a friend was lamenting the lack of a faster furnace, I had a lightbulb idea: Why not a mechanically-powered bellows for faster smelting? It'd be a suitable end-tier goal. This also got me wondering, however, if such a challenge would be a good way to forestall the "win condition" of Steel tools - once they're made, all other metals are used for nothing more than door hinges, so making them a more difficult reward could be good. If a mechanical block that interfaces with player-operated hand cranks were added, you could have a friend man the bellows... and eventually get a windmill when they complain too much. What do you think? Would a mechanically-operated furnace be something you'd like?