Shelf Bracket (Designed for 3D Printing)

Check out version 2: https://www.thingiverse.com/thing:3803573

A bracket I designed based off of my other projects. I think it will hold up alot of weight. Feedback appreciated.

2mm thick 20mm tall everywhere but the side covers which are optional.

Assembly required, perhaps a little glue, but they all fit well as all tolerances are measured accurately.