How to create an action similar to Push/Pull on a curved surface?

Greetings All,

I am trying to create an irregular shape on a curved surface for a fireplace surround mockup.

I have attached a couple images that hopefully communicate what I am trying to accomplish.

Also included the .skp .

Thank you very kindly.
Fireplace Mockup.skp (266.2 KB)


One option would be to use Joint Push/Pull. Frankly, though, I would make sure the wall is a solid object and then make a cutter volume that could be used with the Solid Tools to Subtract the part I don’t want.



AHAAHA! It took me a bit to figure that out, but I think I understand it well enough to make it work.

Thanks DaveR, as usual, you come through in the clutch!

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