I agree 100% with the last two posts, I have seen many blow up even before a gallon has been run. Cheap piston material causes the skirt to break loose and destroy the engine, weak rods and main bearings that let go due to extremely cheap ball retainers. If the skirt lets go, or the retainer falls apart, it's almost certain the engine will be destroyed. The Picco .28 is the best quality MT engine available for $200, next is the LRP/SH/etc but even they lack the quality of the picco with a billet piston, Swiss bearings, beefy con rod and block construction, and a crank that is made from some of the strongest steel I have seen in nitro engines.