IKEA Antonius hack: "Rill" caster wheel bracket

I have an Antonious wire mesh drawer that I use for tool storage. I wanted to make it mobile and put caster wheels on it, but there was no way to attach the wheels. So I 3D-printed these brackets.

Metal threads are inserted in the plastic and the wheels are screwed to the brackets. The brackets are then fixated to the drawer with zip ties. It's a very sturdy design.

UPDATE!
Bracket_4 is a new version that attaches to the drawer with screws instead. You will need to drill and tap holes in the drawer to attach them. 2 screws/ bracket.