Bed shelf

Hello everybody
I made this shelf for my Ikea bed with 29mm side thickness.
This bed shelf has 3 parts: 2 mounts and plate.
I use small screws because plate can be built with another material, for example cut plywood by laser.
Plate has 5 mm thickness and 260x210 size, but you can made it bigger (or smaller).

I tested previous version of mount and it withstand 7 kg, so i hope new one is enought espesially because 2 mounts are used. (also I believe plate will break down earlier =)
Also I