Here is a custom 30.5mmx30.5mm adapter for the LUMENIER MICRO LUX F4.
It is printed in TPU (ninjatek) to protect the flight controller from vibration and shock.
Store EU:
https://www.drone-fpv-racer.com/lumenier-micro-lux-f4-1308.html
https://www.facebook.com/Microdure/