Summary

This design requires one Keyboard Switch such as this - https://www.amazon.com/dp/B0DSHTPSL3

All the parts print support free EXCEPT the Radar Body, which needs supports for the holes in which the keyboard switch will go, and the Capsule Corp logo on the bottom

Print the Keycap Holder if you need extra support to hold the keyboard switch in place, and glue it right under where the switch will go (make sure the switch is in place before gluing). You can then glue the Button to the top of the switch.