Steam age/metal mixing bench + new metals

[AndrewT]

This would really improve the progression as it will be relatively easy to get into the steam age once you acquire iron tools to easily collect coal and water with a bucket now this steam age would obviously include steam powered machines and vehicles such as large balloons or even small airships, basically the closest you can get to a steampunk world in the apocalypse this would a good reason to bring in the Joke Blimp in as an official vehicle. now as for the metal mixer bench the name should tell yall what it does which is simply mix metals together to make stronger materials including the ability to mix copper and zinc to mass produce brass that way we no longer have to rely on finding brass items to smelt. now obviously brass items can still be found and smelted.