Eric wrote: Four table-tennis balls on a cross about the same diameter as the rotors. made of spruce, if you are too tight for carbon. tie the cross to the 'legs', job done.
The TT balls stop the skid ends from digging in and tripping the heli
They also add a little stability and let you get away with quite ropey landings without doing any damage.
I've still got training legs on my walkera #4