Dave, Attached is the model to explain it. Thanksexample001.skp

Hi tak2hata,
I tried it in SU 8. I did a simple wall and a circle face in front of it. Then I applied this plugin. It only duplicated the circle (but grouped). I tried using window components on it. It also made a intersection profiled face on the wall. I have no idea how to figure out this. Can anyone help?

This is from RenderIn