My LHS owner said the piston/sleeve sets for the Tuned GRP might be back in stock around the 18th. Can anyone confirm this will happen. I have a two gallon Tuned .21 with a broken piston. Not sure how it happened. I had the clutch/clutch bearings fail on me at my last race and upon removing the engine I checked the piston through the exhaust port and noticed the piston had a chunk missing. So I removed the backplate and there were two pieces of the piston stuck to the inside of the engine case. Just two pieces. No grinding, or contact marks, or nicks on any other internals of the engine. Weird.