23
A'ight, today's task is to lay out some new Radio Towers, to prep for exploring, and the next factory I'll be building. I have exactly 0 Mercer Spheres left after the last factory, so I at least need to stock up on those.
Aaaaaaaand, after getting these two built, I found that there's only TWO Mercer Spheres available in this area. Apparently, I did a pretty solid job exploring here already. That's not nearly enough, so I laid down a third one.
It's starting to get noticably laggy when building blueprints, or traveling in hypertubes, or running around with holograms out, but for just normal walking around, it's still solid.