Modular shoe rack infinitely extendable

My wife needed a new shoe rack - challenge accepted :)

Since I couldn't find a printable shoe rack which was flexible and easy enough to print for my needs, I designed a modular shoe rack, consisting out of:
* __Base unit__ dimensions: 240 mm x 220 mm x 173 mm, material needed: 265 gram,
printing time: 11:25 (Bambu PLA). The module is large enough that most footwear (except boots) fit well. The module can be scaled higher if desired. There is also some space on the sides for a brim.
* __Extension unit__ dimensions: 220 mm x 220 mm x 173 mm, material needed: 195 gram, printing time: 8:46 (Bambu PLA). Size is aligned in such a way that the gap between the pillars is the same as for the base module. The extension unit connects together with the base unit using dovetails. No additional prints/materials are needed.


The model has the following characteristics:
* The base and extension models connect together with dovetails. Margins are sufficient to easily click the extension