Bambu Lab A1 spool holder

Replacement for Bambu Lab A1 spool holder, almost without friction. It was designed to help while printing flexible filament.
It uses two 626ZZ ball bearings and a 6mm aluminium rod.
There are two versions. The second versions adds a clip below each arm. Both are provided in STL format (all parts in one file). I also provide a STEP file containing all the elements including rod, bearings.
Moreover, the original design can be found as open source in Onshape public domain: https://cad.onshape.com/documents/696ff2937c7c662c0e110f65/w/6ab3c934a2f19b0912c92028/e/fd7af332c6cb27f3c67abfeb
--> Just right-click on a part to export into your preferred file format.

A French description of this thing is available on https://wiki.logre.eu/index.php/Bambu-A1_support_de_bobine. (LOG means "Laboratoire Ouvert Grenoblois", and LOG is a French hackerspace in Grenoble-France)