Here is a custom 30.5mmx30.5mm adapter for receiver Mini RX FRSKY Furious fpv .
It is printed in TPU ultimaker 95A (ninjatek) to protect the receiver from vibration and shock.
A version with and without buzzer
Mini receiver furious:
Tpu Ultimaker (ninjatek) 235 ° / 75 ° / 50mm/s max