How many bases did you have, and how much did you use the hab domes (how much did they grow)? Also, did you build all the SP's on the way? There are good builder techs on the way to hab domes; that might have something to do with it. Can you please give more details about this? In single-player I use hab domes alot, mostly for aesthetic purposes (I like having pop 40 bases as I churn out Transcendent Thought 50) and I would very much like not to feel stupid.
Nice recap of Dumbo, by the way.