This storage system was originally inspired by "The HIVE" (https://www.thingiverse.com/thing:1743145). It is fully customizable, see openscad source for more info and examples. You may need to adjust tolerances depending on your printer, default should work fine for Prusa i3 MK2/MK3.
No supports are necesary, all models are oriented in print positions.
Frame as is should be printed with 0.4mm nozzle, for larger nozzles you may need to increase frame_t
to have larger locks.
The author hasn't provided the model origin yet.