That is some good info on engine tear down. Please note on the Evolution 46 engine that the sleeve can be rotated any direction. You may need some new engine gaskets. Just the two aluminun head gaskets and the back plate gasket. If the sleeve is put back wrong you will block off some of the ports. Note the notch on top of the sleeve. It should be pointing directly to the back of the engine. When correctly installed looking through the exhaust port you will note none of the sleeve is showing. Only the middle bar. If the engine hit first and hard, check the crankshaft end to be sure it is not bent. It dosen't take much. If you can see or measure any bend greater than .002" replace the crankshaft. It is only about $20.00. A bent crankshaft can shake your plane to pieces quick.
Good luck with cleaning and rebuilding.