I neglected this blog somewhat and a follower now inspired me to post again. Thanks Michael..
First of all: I completed the video of the 'Boulevard Haussmann' top floor appartment!
https://www.youtube.com/watch?v=dxlFUET4kx8&t=1s
And - yes - I did work with Kapaline foamboard. For the lower floor walls I used 3X10mm walls in order to get the necessary recess for the windows.
At the moment I am busy as projet manager in real life with the renovation of a terrasse roof garden. The roof hat to be replaced and this was the opportunity for the owner to make something beautiful - especially since the view is absolutely fabulous!