Drying rack for showers

What?
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Two of this parts(* see below) and a 11.5mm square aluminum rod combined form a capable drying rack for all-glass shower-cabins with 8mm thick panes.

Why?
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Modern business shirts are great: Just wash them with the "Shirt perfect"-program, let them dry and they are perfect.

Down side: They are still soaking wet when hanged to dry and drip on the floor.

In summer, this is not a problem, in winter time we used to lay a broom handle on top across the shower cabin and hang the shirts there. This tended to be quite instable (we have cats) and so I came up with an contraption, that sat on the 8mm glass pane and holded a 11.5mm square aluminum rod from the hardware store.(In Germany, 11.5mm is a common size to be found at any major "Baumarkt").

This can be rigged up and removed quickly and adjusts by sliding the parts in and out as needed.

How?
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You print one of the holders as is.
Depending on the geometry of the shower cabin (euclidian/non-eucl