Hi, thanks for sharing this accessory with us. Please be careful about using some different third-party accessories as they may affect the performance of your drone while flying. Thank you for the support and have a safe flight always.
Looks interesting and i thought they might be heavier than what they are, however i feel with more care you really dont need them.
However i will try to research them .
The springs are a little stiff but they look like they would reduce the impact, but really the Spark normally lands softly using vision so for me they are to raise it a little off of the ground.