Shock-Absorbant Legs for DJI F450 (Rubber Bands)

After many crash landings with a project of mine, I have realized that a suspension system for my drone to land safer, while at the same time preventing it from crashing the ultrasonic sensor underneath. If you are having similar troubles, look no further. I have both the version with extended posts (v3) and without (v2). Both use the same leg design (BacakUzatma) piece. (The design of the short posted leg is a bit wider on the inside. I will post it again after fixing.)