Prusa i3 MK2 Multi Material spool holder shelf

Poles to create a shelf of the Prusa i3 MK2 Multi Material spool holder.
The poles have a tight fit on the bottom and a loose fit on the top, to allow easy removal of the upper spool holder.
The inner lip of the top side is a little shorter to tell the top and bottom apart.
They fit quite tightly if you have, like me, forgotten to remove the foil on the acrylic parts.
Additionally, I uploaded the test part I used to determine an optimal fit, because I think they make quite nice corners for t