This is a remix of Duke_S Leveling foot to fit over the printed corners of melnikod's Electronic enclosure. They slide up into the corners and attach with m5 bolts and t nuts. (I found it best to put the T nuts up into the printed corners 1st since they are so deep compared to regular extrusion. I used M5x12 bolts. Note I don't know if these will fit regular 3030 extrusion, I believe they will slide in but there will be a large gap on 2 sides since they are made to go on the electronics enclosure printed corners.