Shelf Bracket with a French cleat system

I've designed this robust Shelf Bracket with a French cleat system, which comes in sizes from 3 1/2 to 9 inches. I've been using my Bambu Lab P1S and A1 Mini to print these, and they've been reliable so far.

I'm releasing this under public domain, so feel free to use, remix, or share it. I've uploaded Step files for each size.

Details:

Sizes range from 3 1/2 to 9 inches, but I'm considering adding metric versions.
French cleat for easy, secure mounting.

Printing Tips:
Works with PLA for light use, but you might want PETG or something stronger for heavier loads.

I'm thinking about creating a metric version if there's interest. If you have any feedback on common metric sizes or would like to see this in metric, let me know. I'd appreciate your input to make this useful for everyone.

https://buymeacoffee.com/randybell