Hi all, I am a longtime lurker here working on a new project that I am kind of confused about how to progress I am modding an old HP server rack and want to replace the old side panels with custom made aluminum panels so I can anodize them (steel cannot be anodized) My question has to do with the corners The way the side panels are constructed there is a fold on all four sides that actually pushes the face of the panel away from the rack frame 2 1/8 inches or 5.3 mm for you Metric folks Its this fold on the edge that concerns me, the way it is now, there is a crease on the bottom 2 corner for the edges to overlap to form that fold, but at the top two corners there is no crease. How in God's name do I make those folds at the top without creases or overlap? I just don't understand how to form the metal this way using a single metal sheet. Normally i would take a single piece and cut it into a rectangle with extensions (forming short cross shaped legs) on all 4 sides that would be tucked under and fitted together on each of the four corners. That would create a crease on each of the 4 corners, How do I get the crease only on the bottom 2? Am I missing something or is this something done during case fabrication that I cannot hope to match?