Gridfinity Utility Knife Holder

This thing fits my trusty random utility knife. The knife itself is a little larger than 1x4 - but since this holder is usually in the front row of my organizer it does not really matter.

FreeCAD file provided for those playing along at home.

PS: If I would have to re-design this part, I would probably get rid of the bump in the middle. And probably make the walls a little bit higher.