Surface selection based on intersection surfaces

[ruud.vanknippenberg (RV)]

Ahh Perfect!
Thank you

If you would like to have another challenge, see the item below
Its about selecting all surfaces which are in 1 plane. There are already a couple of suggestions done, however not (yet) the one I am looking for, as I explain in my Re.
Do you have any suggestions?

Thanks again!

Select/group all surfaces the same plane

Hi! Thanks again for your help! But there are still some challenges to go ;). challenges; In the new file, there are surfaces missing in surface 2, in the front and the back see picture. The surfaces don’t necessarily have to touch each-other. The only condition is that they lay in the same plane. So when looking from the top down, they have to be in 1 line. See attached a new file, where I added 6 internal walls, which have to be in 3 selections (2x3)… A suggestion woul…