Those panels are looking nice. Once the stain and possible clearcoat is applied, and they are mounted on the wall, they should look fantastic.
Your build technique using the foam to hold everything in place may well become a popular one! These discussions are producing some great innovations.
The question of how to best arrange multiple panels is indeed one which seems to have no definitive guideline. Your approach is, I suspect, as good as any, with the added advantage that we all get to see those lovely N23 panels!
Well done!
