🇩🇪 MNT Research
MNT Reform Anti-Flexing Bars
Designed to reduce keyboard flex on the MNT Reform Laptop by mounting between the motherboard and keyboard. The set includes two PLA bars measuring 100 mm × 8 mm × 3.25 mm, and the product page notes that owners of a 3D printer can also print them from the provided STL model.
Photos

Image: MNT ResearchSource