You actually seem to be coming toward a similar place I went to when I came up with the Gnarlycurl, except that I didn't go for stealth because "in a million years or so this will be the south pole of Cybertron" was always in the back of my mind, and by concept it was tough enough that it might be boarded and taken over but indestructible short of dropping it in the sun, antimatter, or really big nukes. I don't think it would be out of line the have another megavessel, or even to build it with your