I see that by using statuary, Hammers has neatly got round the great 'where does the door go?' debate. He can have a door in any side he wants. Though I would say he needs to have the Father and Mother adjacent to one another. I read that marriage ceremonies were conducted between the two statues. It might be that a door would be in the face opposite to allow for a procession in a straight line in and out...
It still leaves the quandary of how the internal spaces of septs without statues, but niches with murals etc are organised. I think an octagon still works in those instances while still referred to in the vernacular as a 'sept', unless perhaps the stranger is not represented