I've seen such posts BlauK. You can force the TE to do things in different ways. Look for a definition of a Group Master; I have and I've never been able to find one as it applies to AH. Not in any thead or any of the release ReadMe files, not in any of the help file I've lookded in and I've searched them. IMO, maybe the Tower but probably the Map Room fit the implied definition of a Group Master.
Skuzzy once posted about Group Masters but his post implied he was answering about Zone Masters and it didn't match the context of the thread so I've always gone with the the oldest instructions and followed the advice of those who have come before me.
I've actually looked for anything that counteracted the old advice and htc has never posted anything to contradict the advice of Pokie, Nuttz and others who were here talking to Hitech in the beginning. In fact some of htc's post have said, and to paraphrase now, " the 'expert' map makers who should know better have gotten it wrong."
I often find myself in the postition of recommending something htc might say is wrong or another terrain maker will definately say is wrong. I will only say what is working for me and makes sense to me; you can decide if it works and makes sense for you.
From what I know about the TE and the OE, a CV could be a Group Master but isn't as far as I can tell. A Tower could be a Group Master but again, not as far as I can tell. The only thing I can find that fits the implied definition of a Group Master is the Map Room. If the Map Room is destroyed, all the other objects of the field or fleet are captured. For crying out loud, the Zone is capture if the Map Room is captured. I could be wrong, but I think the Map Rooms are hard coded as a Group Masters. IMO, assigning any object as a Group Master is wasted effort. Edit: Unless you want to make the map room look like a building, then you'd definately want to make it a Group Master.
