Wera Style Twist Unlock Socket Holder 1/4

After a long time of 3D drawing and testing, I present to you the first 3D model of the Wera Style Twist Unlock socket organizer 1/4 size. 

You don't need any special tools for assembly, everything snaps together.
Fusion 360 files have also been added in case anyone would like to adapt the model to their needs. 

Depending on the sockets, it may be necessary for the "Lower_piece" piece to cut or pinch off just a hair the front tab that holds the socket in place. Sometimes just 2-3 strokes with sandpaper are enough, and the socket snaps into place (still being optimized).

Since the model is not yet 100% finished, I am asking for feedback if anything needs to be done.
Models "End_cap" and "Upper_piece" need support (also visible in the attached 3mf. file)

I will be glad for any feedback.

Enjoy.