Before the latest commit the window sill end parts were two different nodes each for one side. But since xFurniture uses so many nodes having one item less is a big deal so I unified the end part.
Now the same node can be used for both ends but instead of the previous end which was a distinguished end part the current end is only some kind of extension and I am not quite sure about this.

I added a second sill concept being only one node (so xFurniture would use two less nodes in total, which is a really big deal because having two nodes less means two times the amount all supported loaded non-filtered base nodes are saved. Depending of configuration this results in a couple of hundred less nodes to be generated by xFurniture.

The structure elements are subject to change. One single sill looks like this:

So what do you guys think? Which version is better? The modular one that, well, is modular, or the combined one that uses two times the amount of all nodes less and has a proper end and some more structure?
Both variants of course support indentation and come in all loaded supported not filtered base node variants.