What?
Allow the foundry to cast finished heat pipes out of molten iron and copper, with 50% productivity. The idea of also making rails this way (from molten iron and inserted solid stone) sounds very appealing too, but may be too good. After all, rails are made of both iron sticks and steel, so direct casting may remove a little too much complexity.Why?
I was pleasantly surprised by the additon of the direct pipe casting recipes. I would love to see more such recipes, and rails and heat pipes seem like ideal candidates. It would also be nice to see another recipe that use both molten copper and iron. And as I said, improved and simplified rail production would be so convenient that I worry it may even be too convenient