Hi Ekar, unfortunately the geometry library MoI currently uses does not have a good function for that. In CAD it's a pretty difficult operation because it works fairly differently than in poly modeling. The CAD way involves extending both the rotated face and all neighboring faces and re-intersecting them with each other. It's a far more complex operation than just a rotation by itself.

I'd like to have that in MoI in the future, but it may involve a lot of work with integrating a different geometry library that is better at doing it.

- Michael