Yesterday, while landing manually and about a foot off the ground, my Solo flew rapidly to the left and flipped over. It broke one prop and scratched the other, so I am replacing the full set, but two of them are impossible to spin off. I am spinning in the direction of the arrows to unlock (one black and one silver) and have had two Phantoms for a couple of years so I know what to do with props. Any suggestions for how to remove them without breaking the quad?