Hole in curved surface

curved hole.skp (1.1 MB)
Hello, I need to put a hole through a block with a curved surface on one side.
I have tried many ways but I always end up with a protruding artefact on the curved surface.

I enclose a file to demonstrate. Thanks for any help, cheers, Bruce

I don’t see the file.

Sorry. I have uploaded now.

Got it.

Select the curved surface and the side of the extended hole, right click on it and choose Intersect Faces>With Selection.

Erase the extension of the hole and delete the skin over the hole.

Magic! Thanks very much, Cheers, Bruce

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