i have seen some posts about loosing access to researched tech if you loose number of research stations required for it. Can anybody conform this? I was under the impression that you only loose access to structures/ships that belong to that tech level, but not the upgrades. At least in interface, only ship/structure tech gets disabled, rest does not. In my last game on small map i have removed 3 empire stations after i have completed empire research and did not see the loss of upgrade tech in UI.