Hello again,

the red sketch is the envisioned result. I've attached another file which should give a better idea of the requirements.

Basically I need an almost L shaped extension of the edge like the red shape which extends the upper surface like indicated in green and blends into the side (the upper surface points to other parts of my design - blue arrows). At he end the extension should be 4mm thick.

The existing shape must only be modified near the edge for a defined length so working with surface points doesn't work as this would change the shape of the original part. It would be ok to cut the edge if e.g. blend would be part of the solution.

I hope that's a clearer explanation.

S.