The first line in the flight manual should read: "You will crash".
The stock landing gear on my 3DR hexacopter are fine for experienced pilots, but while learning to fly, you will crash. At the very least you will make hard landings.
I removed the surviving polycarbon landing gear and replaced them with much more forgiving parts.
I Ty-wrapped three 1/2-inch foam pipe insulators purchased at our local home improvement store. Then I cut the top of three Easton 9-inch practice balls and shoved them into the "T". While this photo doesn't show it, one of the Ty-Wraps goes through the ball to help keep it secure on the insulator "T".
Do not try to use the hard plastic Whiffle balls from Target or Wal Mart. They are not flexible and difficult to work with. The Easton practice balls are pliable and can be cut with scissors.
Note also that I painted the outboard balls black and left the "forward" ball in its native fluorescent green. This really helps with my orientation of the copter in flight.
These are temporary while I learn to fly proficiently. The balls are in the direct down-wash of the propellers and have to be contributing to my yaw problem. I suspect that this is because the training wheels are on the arms for all of the CCW props, and the CW props are not similarly compromised.
I plan to soon add a camera gimbal, and the balls are too low to the ground, so another solution has to be engineered.