Hi

I am trying to create a 1 mm surface offset on the interior face of this shape. The offset should increase the cutout size. The cutout has been created using the cavity feature when I overlaying the ellipsoid onto an aerofoil section.

I have tried creating a 1 mm surface offset with trimming and cut-thickening but to no avail.

When trying to create a surface offset, something odd happens (see image