Compact thin vertical shoe holder

You have a narrow width between your wall and your door, and you don&#39;t want to loose this space ? I couldn&#39;t find any shoes holder online to buy or 3d print that takes less than 15cm width. Here is my solution for all these constraint :15cm widthFit A1 miniMinimal use of material (<80g per floor)Easy assemblyNo fixing/fastening on the wallEasy to grab and put back shoesUse with sneakers and other low-height shoes.It fits behind a door with narrow space behind by putting only one shoe per ‘floor’. Material needed per floorx2 M3 screws 8mm long (if you don&#39;t have 8mm long, you can take longer)x2 M3 nuts Printing settingsI&#39;ve printed it with A1 mini, PLA, .4mm diameter nozzle. You can reduce the infill to 4-5%, I&#39;ve used honeycomb. You should use &#39;Z Hop when retract&#39; in the filament settings, without it the print might fail near the end, when it is starting to make the last bridge.Each floor takes 3h of printing, so it should takes 30h to make the same 10 floor