Rod holder for 8mm rod (e.g. for roof window shade)

I have made these parts to hold two rods vertically alongside a Velux™ window to carry a window shade.
* Halter1.STL is the lower part
* Halter2.STL is the upper part which has a *hook* for to keep the upper edge of the window shade in place
My wife made the shade from some spare fabric. It looks great!
The parts are mounted with two 3x12mm Spax™ screws each.