I have a sheet metal part and i need a hole in one of the sides. I can extrude cut the hole in the folded part, but it won't let me unfold because the hole is through one of the bends. I can put in a hole in the flattened state, but when folded again the hole is suppressed. Is there a way to keep my hole in both the folded and unfolded states? The hole needs to be in the side in such way that flush with the bottom of the part. I've included a zip file of the part. Any help would be greatly appreciated.