I am still flying an Enya .60 from the early 70's on my hots.. Parts are still available, I have replaced the ring 3 times over the last 12 years.. bearings twice.. I fly it every other weekend. wore out 3 sets of wheels and two sets of servos. The enya is a good engine and will last a very long time.. Be sure to use a fuel filter. The fuel nipple will plug with trash and cause poor running. You can pull the needle valve and use a pin to clear the fuel nipple inlet.. Keep it clean.. Jim