Iused to fly about 10 years ago. Recently getting back into flying and purchased two Evoloution .52's. The first run on both of them did exaclty the same as follows: Started great and ran great however, the gasket between the muffler and the engine blew out, then the screws back out, causing the engine to die. Has anyone else had this problem and what might be the fix. Idid have locktite on them.</p>