Anti Vibration safety pins. Basically just stop catches incase the quadcopter (or what ever craft) hits something or crashes and the anti vibe ballooons pop free, the lower plates stay attached and the camera and gible or what ever doesn't get lost.
Pins need to be a flex material - Ninja flex, TPEE or TPU materials
clips need to be a rigid material, any basic PLA, ABS, PETG, what ever, it really doesn't matter.
MUST PRINT SLOW!! very slow and with supports where they are tall and thin the supports actually help prevent wobble more than hold up.