mothballed ring world components

[gregebowman]

Probably not cost-efficient, but the few times I've built rw/sw's, I used ships with spaceyards on them instead of an actual starbase. That way, once I'm done with the building, I can move them to another area and built another one. In one game before I quit it, I had a rw and a sw. Would like to do that again, and have a few more also.