Here is a custom 30.5mmx30.5mm adapter for Furious FPV-0121-S FRSKY . 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: Store EU: https://www.drone-fpv-racer.com/furious-micro-rx-frsky-1172.html Buzzer 9mm : http://www.banggood.com/5V-Buzzer-Alarm-Beeper-With-Cable-for-Eachine-QX70-QX90-QX95-NAZE32-F3-DIY-Micro-Brushed-FPV-Racer-p-1100338.html?p=LD020411878172015024