Hi Joseph. That is very helpful. Pretty much exactly what I was looking for. I can’t help but notice, your image also shows all the normals facing out. Not sure how you did that. The attached illustration shows what I am ultimately shooting for and to accomplish this the aligned normals will be critical to calculating correct dihedral angles. I have another thread going on this separate topic but I noticed you have been active in the past on similar questions. Thanks again for your help.