hy i have the 45 gx and i keep having problems with the spark plug getting loose and the metal ring around the plug keeps fallling off then i loose spark and guess what [:@] another dead stick landing. has anyone els had this problem i very tired of this and thinking of switching to a DA50 or the BME50 what are your thoughts . The plane is the great planes CAP 232 ARF kit with the 45 gx it weighs about 13.5 lbs no fuel what motor would be best for 3D type flying thanks