GridFinity 5x4 Storage Box Top

Inspired by https://www.printables.com/model/702824-gridfinity-storage-box-by-pred-flattened-top A version of the GridFinity 5x4 storage box flattened-top that prints top-side-down. What I did was remove the four corner keys (making them separate parts) so the cover could print upside-down and flat on the build plate. Curved key pieces can then be inserted into the pockets in the corners to allow for case stacking. The model fills most of the build plate (Bambu P1P) and as such has integrated "mouse ears" (easily removed) aimed at reducing corner curl. Corner keys are press-fit (by design, YMMV), but I glued them in with a drop of superglue.