I have two ASPs and they run like champs. My .46 has been flying on a Tiger 2 for almost 7 years without a hiccup. I have worn out two needle valves and am on the second set of engine bearings but that is to be expected on an engine with this much time on it. The plane is on its third set of tires and its second set of wire gear. you know you have flown a plane a lot when you are taxiing and the wire gearjust folds under! The plane has over 500 flights on it, it gets refurbed every two years, new covering etc.