Make a big box (top & bottomdown) from your rectangle
kill or hide all curves
Boolean Diff
Kill the rest

That wouldn't work, either. I tried solids, but no go. I was finally able to get it to work by Boolean Differencing each individual panel or surface, one after the other. Ugh... Thank you for the idea, though!

Bob

Hi Bob, I think the part where the booleans try to intersect the pieces is getting confused with there already being a cut through that same spot.

Instead of doing a boolean in this case you can select these faces and delete:


- Michael