I'll be around this weekend and, as per usual, would be up for pretty much anything.
I have been meaning to try out Empyrion again since it left Early Access, and I've also never tried it co-op. A long time ago, in its earlier EA days, I had built out a nice sized base with a farm. Then, on the other size of the farm, I built a hanger and a connecting skyway that went over the farm back to the main base. I had also built a custom small ship and a larger "capital ship" that stayed in orbit, used the smaller ship to shuttle between the surface and the cap. And that all was pretty early on in the EA process...