What is the best way to get flat pattern dimensions from a part that was not originally created from a flat sheet? I start all of my sheet metal parts as either an extrusion or a base flange of the finished profile because 99% of the time the outside dimensions of the bent part are the most important. However, on my shop drawing I need to show the size of the flat pattern in my BOM. Right now, I simply put some reference dimensions on the flat pattern in the part document and link them to a column called "sheet size" in my drawing. It seems like there should be a better way to do this.