I dug a pit behind my workshop and covered the top with iron floor. It's fun to walk by and watch it do Mad Science. Sometimes a spark escapes the gap between the iron and the side of the pit. Random fireworks! Being outside isn't terrible for it. I sometimes repair the iron when I go by, but it doesn't really need it.

I just need more than five cores so I don't have to keep tearing things down and rebuilding.