How do I make a self-return with crown molding on a corner cutting in position?

Question:I want to end my crown molding at the end of an open wall that is not perpendicular to another wall. The spring angle of my molding is 38 degrees. The wall to ceiling angle is 90 degrees. I would appreciate any information or references/ websites that anyone would recommend on how to make this self-return not "in the flat position" on the mitre saw. I appreciate your thoughts in advance.

Eric

Answers:
it doesnt make sense to do it any other way.