Wondering how critical the glow plug position is (have a P80). I know the manual notes that it should be upright ... but the engine hatch is on the bottom of the aircraft and if I mount the engine so that the plug is upright I will have to remove the engine whenever the plug needs replacing. Would mounting the engine so that the plug is at the 4 O'clock or 8 'O'clock position be acceptable ? ? Thanks. Bob