AM3+ to AM4 Stock Cooler Adapter Retention Bracket

I needed a cooler for an old AM3+ motherboard, and all I had was an AM4 era stock cooler. So I made this system to adapt the two.

This is designed to be used with M3 heat inset threads added to the backplate, with screws to match. I using 10mm screws and these inserts: https://www.amazon.com/gp/product/B087NBYF65