How is it going? I am making shelves for my surround sound speakers out of oak to match the wood in the room. I would like to continue with the Crown Moulding with this project. However, I am not quite sure what the cuts angles are supposed to be. I am putting the shelve in a corner and would like the speaker to face perpendicular to the corner. The angles on the top of the shelve are 45 degrees. I have tried several cuts but can't seem to find the right one. I have wasted a great deal of money cutting and cutting. I hope you can answer my question. Thank you for the attention to this query.