I did design this angels for our Wickeltisch / diaper changing table in our Pax Wardrobe. It did print it with no support, 0,2 mm, 50 % Infill. Propably the normal Ikeas hooks will do, but I wanted to be safe.

Also when I had my 3D Printes in that original Pax befor it did sag a bit. So the system maybe also useable for a 3d Printing shelf.

The first angle file is with more holes and if you are using a new non Ikea shelf.

The second angle file the hole should fit the original pax shelf.

To attache does to the Pax Wardrobe you will need some 6,3 x 16 mm Scews like does

https://www.amazon.de/dp/B08YS2X2FC?psc=1&ref=ppx_yo2ov_dt_b_product_details

For our diaper changing table I did exchange the standard Pax Komplement shelf with a new shelf with 961 mm x 750 mm size. I recommand to screw the angels on the sites first and after that put the shelf on it and mark the holes. Drill the 5 mm holes with a drill with a dept stop (14-15 mm depth) multiple dept stop print to be found on printables.