My stackable, modular shoe rack consists of four different main parts.

1. Top Part as the ending layer for your favorite pair of shoes to be presented.

2. the middle (Backbone) part wich can be multiplied as many times as you like in form of two different print profiles. 

   - small one with a height of 125mm for lower shoes

   - higher one with a height of 175mm for higher shoes

3. the bottom part that leads to the diagonal secure stand.
4. the connector is able to stick multiple towers horizontally together and leads to extra stiffnes.

all parts can be assembled intuitvely according to poka yoke and lock into place using pre-tensioned elements.

to loosen the parts you just need to pull the flap softly and slide the parts apart.

just choose the parts by using the 5 printing profiles.

the shoe rack does not require any supporting material.

For further developement i planned to design elements wich can be placed in the inside of the segments tubes and can be connected in the inside by using a metal pipe. this schould makethe system stiffer and higher stacked variants possible.

Feel free to enjoy the pictures of my printed parts as well as ask if you have further questions.

Update:

Several users reported that the locking mechanism could break. This issue has now been fixed.

Assembly is still the same: simply slide the parts together. To lock them, gently press the pin after joining the parts. They are now securely connected.

To separate the parts, pull the pin.

All plug-in components have been redesigned and can now be printed without support material.