You are probably still tilting since you wrote Hive account@durgwars. I have also done huge mistakes in the game even though it is pretty easy to calculate the cost/benefit of the upgrade. Today, for example I came home after work, tired after diagnostics, and upgraded a weapon storage instead of weapon production with 15% ROI. So, we all do a lot of costly mistakes even though we should not. AI will wipe us out soon...