T-Beam Supreme Case with 1/4-20 heatset insert mount

Heatset threaded insert I'm using can be found here: https://www.amazon.com/gp/product/B08PVQX853/

Reinforced the area the insert goes into. Everything else is the same as their original design other than the insert hole and the inset area on the bottom to accommodate the insert hole.

Enlarged the ¼-20 threaded hole to 9.25mm to accommodate a brass heatset threaded insert in the case that accommodates 10-13mm antennas.