easy to make prop saver
 

Take an old prop and measure out 1/2 inch on each side of the hub and cut it. Bolt it to the motor shaft just like a normal prop. Cut the shaft 1/8 inch from the prop saver. Take a 1/4 inch drill bit and drill the back of the prop you are going to use to fly with out [just the hex part . Only about 1/8 inch deep.] Then rubber band the prop to the prop saver with 3 or 4 bands. Mine works great. Here are some pics I hope they help.