Desk shelf

In need of a monitor riser which fits a music-keyboard below the monitor I went to the store and wanted to buy some modern simplistic legs. After seeing the price tags I went back home and modeled these legs, supports and shelf spacers. The legs screw in place at the corners. They are designed to be used with 20x4 [mm] wood-screws and a 1.6cm board without the screws poking out the back. If you use thinner material, you should use shorter screws. The support can be used for longer boards to supp