Progress has been made! first I added at knob on the screw that secures the rosette. then I printed 3 more on the delta printer:

Assembly time! I captured a timelapse of the first part the assembly/modification of the shoeshelf. The sceond part, well my dji osmo turn off because of ehm, empty battery reasons. (It only lasts about on hour in timelaps mode).

First shelf assembled!

The 3d print is strong and did exactly what it was supposed to do.

Now i don't have to be bothered with shoes all over the floor! Project success!