none of the issues u seen in the vids were from the training gears the 1st vid clearly the operator doesnt have  good control of his bird probably to heavy on his stick inputs etc  the last video dude had something come loose that caused the wreck  these pretty much keep you from tipping over when taking off and landing and chewin your mains up in the ground what size bird u got i will poke around the stash i know i have some for 450 size and 250 size i will give u a set u pay postage  just have to find the stuff first  .