Summary

The stock feet didn't have much lift, so I made some that were 30mm high to let the bottom fans breathe a bit more, similar to the nr200 feet. This uses the same mounting hardware as the stock feet (Pcie Bracket screws) With rubber feet added on, it's roughly a 32mm lift. For rubber feet, I used 3/8" rubber bumpers I bought from Home depot. They're super grippy despite the size.
https://www.homedepot.com/p/Everbilt-3-8-in-Self-Adhesive-Clear-Surface-Bumpers-16-per-Pack-49964/203661136