Can I suggest we have one mine building, it would cleanup the tool bar with an in game mechanic. It could have 3 upgrades. the same ores are as they are - no changes there. The mine can mine all the ore-types and it shows you what it mines when you place it, as it does now. Once miners are assigned, there is a slide bar for each ore-type available within range of the mine. Like the production buildings, this ratio will provide the mined ore. At level 1, it produces stone and the mine type. Stone is randomly injected instead of the ore type. So its slow to mine the ore, but side effect free stone. Level 2, refining: no stone, can mine multiple ores - maybe only 2 or 3. Level 3, deep mining - maybe this has additional upgrade requirements but unlocks the deep mining for the “unlimited” mines. Mining unlimited stone in one place seems like it leaves something to be decided.
Technically this is the work camp…but different LOL
Feedback: thank you for auto-planting arborists.