19" works better on my model than 18". I can't say how the measurement would on other people's models; they have to figure it out for themselves.
I can't get a perfect photo-match, so I'm bad at matching and/or the 3D construction is off. Some of the window frame don't quite match. The 3D cartons sort-of line up with the Dillard photo; will have to nudge their placement or try a new photo-match.
For now, it's pretty close to working and doesn't interfere with any trajectory lines projected from the SN.
It is possible to see the top of the open section through the upper section glass and above the horizontal wooden divider in the Dillard photo. Based on that and a similar but better depiction of that in the Alyea image (from the inside), the 19” looks better.
