Just adding another accessory to @luma's (https://www.printables.com/model/52618-ddd-printable-wall-control-system)

This is to keep router bits at hand next to the router. I made one for ¼" and one for ½" collets (if ya'll in Europe use something different I can make another really quick) 

Prints just fine on it's back without supports. Each one needs a right and left side, both together will take up the entire width of 1 panel.