Well, Hello Again ! 
Since I have some troubles with the FN-Key ( I hit it when I don’t want to) I made my own one.
This is a 3D printed key cap the FN-Key with a dent in it, which turned out very well.
Here are some pictures:
It even glows nicely:
And I proudly present the worlds first keyboardio fidget spinner !
and here is a short movie,straight from my camera (I hope that animated gif works)
Here are the Onshape file of the FN-Key if you want to give it a try:
!!! Attention !!!
!!And I mean it for real!!
Due to the nature of the Mathias Keys I have to warn you. The pin for the mounting slot is 4.5 mm x 2.2 mm!
This isn’t a lot of material. Since how FDM printing works, it’s likely that you can break the pin and it will stuck in the key switch slot. Mine works fine but be warned (again) I’m not responsible if you clog up you switch !!
!!! Attention !!!
https://cad.onshape.com/documents/69acee4fe669c0504dfd9991/w/c1f67ffa6cdd45254e0f9700/e/b0f5ff64bd22f5e8b762b69e
If you are interested in how I made the spinner, please let me know. I’ll gladly help you or sell it to you
cheers
Emacsimize