Ikea Kallax mod for (solid) door mount without box

Ikea has inserts for Kallax shelves, with doors (full, or with holes in the Skadis style), but to install them - you have to put the entire box filling the shelf, and through this box the door hinges are screwed. It is not always necessary to have a fully built-in cabinet from the inside, or it simply does not matter (and always - without this box - the cabinet has 5mm more space on each side)Here's a mod on how to install the door(s) without putting in this unnecessary whole box. And in addition, you can use the remaining elements of the box as a partition (shelf) inside this cabinet. This is an additional advantage, because cabinets with doors do not come in a version with a shelf inside, which many people regret.Instructions: (for one box, for one door)print (with a mirror of one piece, easy to obtain in a slicer, or there is also a .3mf file ready to print) two elements "hinge-support" (if you want to make a shelf inside the cabinet) or "hinge" (if you don't