OK, so looks like about another factor of 2X increase needed for most space colonies, and more on the moon. I will think some more about how to do that. I'm a little surprised. For the bulk of development for those two zones, the balanced seems to have been pretty good. But later buildings get more expensive, and originally I had planned that new content at Mars and Venus would more or less be done by Planetary Terraforming. Will do. I don't think anyone wants to retain the mechanism as is. Will do. I had intended to do this but forgot. It's back on my to-do list. Good question.