Thank you! Mark, you may be on to something. In the aerial photos from Google Earth it looks like there are openings in the top knot's base, so ventilation may be its purpose.
Didn't get into the shop until 3:00 today so not much to show, but I did get started on the Mansard trim. There is a sequence of vertical/angled large partitions that add shape to the Mansard, and then there's the corner trim. There is upper trim in two layers; a lower layer connecting between the verticals and then the top trim which is an assembly.
I had to cut through the shingles and the construction paper which lies beneath. I then scraped the area clean to remove any PSA residue. I glued the styrene with med CA and trimmed the tops and bottom flush with the micro saw and then sanded flat.
To get the corners built and not have to do it handling the entire building, I glued the side and front Mansards together and then built the corner. The only additional trim on the side is the upper cornice trim and the back corner which gets treated the same as the front left corner which is not part of the front Mansard, but the building itself.
The only problem with now have a right-angled assembly to deal with is it makes it harder to cut the shingles et. al. away to prepare a good bed for the trim, but I'll work around it.
