Compact Twin-Stand Shoe Rack

This is my attempt to make a stand that would accommodate a pair of shoes in a vertical stacking to minimize wasted space and improve the organized look and feel of a house (in that department). I printed this on a Prusa Mk3 and, even if the upper shoe ended up touching the lower shoe, I decided this is still a good arrangement but your mileage might vary.

I have added a STL for a similar design that adds a lip to catch on the shelf it sits on (it can accommodate a 20mm thick shelf) because I feel that such a design would align in a more ordered way the many pairs of shoes on the shelf, so they all are at least at the same position relative to the shelf front.

The solid modeling file in .rsdoc (Design Spark Mechanical -free CAD) is also attached should you find it easier to modify end re-export the STL with your modifications.

I welcome suggestions and comments should you feel you have something to say/add/etc.