That's alright, Puybaret, as it seems to have worked itself out in the end.
Just after my last post, I made a few additions to the inside of the house.
http://www.mediafire.com/file/k7h7nq44xa3b7hb...side%25283%2529.sh3d/file
I've added beams to the ceilings over the Great Room and the Overlook/Stairway. I adjusted the railings separating the Overlook with the Great Room (there's 3 instead of 2 so that there are now more balusters), and now I think that all the railings have roughly the same spacings. I've also added more posts to the ends of the railings.
The bookcases around the bathroom door were raised to 8 feet and I changed the wood used on them.
I then took a bit of inspiration from a couple of my other houses and put in a row of fixed windows above the Overlook.
I also adjusted the roofing so that there wasn't any disparities visible from the inside.
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