Baking tray holder

We have a small kitchen and always struggle where to put the unused baking trays when we need the oven and cannot store them inside. This is my solution - you can put up to 3 baking trays in and store them vertically at the side of a closet as I did. You can also use the holders to hang the trays horizontally, e.g. under a closet. The back holders have stoppers so that you cannot slide the tray out to the back by accident. As I didn't want visible screws, I fixed the holders from inside the closet. For this, every holder has 6 holes into which you can melt in a M3 thread insert. I used 4 per holder, but had to use different arrangements on each holder because of the design of my closet. For the back holders, I had to use the left and middle holes because the back wall of the closet was in the way. For the front, I had to use the 4 outer holes because of the hinges of the doors. So, just choose the positions that fit your closet. 4 screws per holder should be more than enough. I include