Hi there, I'm drawing a simple control box, started with a base flange and added an edge flanges on all 4 sides to form the box. After adding a few more flanges off of those to meet up with the cover I'd like to go back and make 2 of the original edge bends rips so the box will have a main body with a top and bottom that will get welded on. Is there a way to go back and make the bends into cuts? Thanks in advance.