Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:3997593.

Because the original version broke too easily, I reinforced it a little bit. I mounted the old bearings facing downwards and added cheap LM8UUs inside of this. This fixes the amount of flexing the thin sheet metal allows.

This version has only one side in the file. For the other one simply mirror it. I find this easier in case one part breaks and you want to replace it.

Since Thingiverse stopped showing the original anymore, just follow the link: https://www.thingiverse.com/thing:3711124 (I would still prefer if Thingiverse would finally fix this or at least answer me, why the removed this important feature.)