Made this in Fusion360 back when I was working on an Ender 3 v2 electronics and parts conversion to the frame of a CR10. It uses basic metric bolts and T nuts to fit into the common T style frame creality used. It only has 1 tier of screws due to the CR10 frame being used, but you could probably drill a hole up a little if you needed both rails. It comes with 2 holes on the bottom to screw it in, should be pretty secure for the screen, but may crack easily if you drop something on it (from experience, obviously because it's plastic).