I have a brand new MDS 1.48 that I have just run 5 tanks of 5% fuel through. Not a single problem on the ground, does not stop until I kill it, idles at 1800 RPM every thing worket flawlessly until I got it in the air for the first time yesterday. Then, DEAD STICK!!!!!! The only thing I failed to do was check the engine performance on the ground with the plane at a 45 degree angle or more. Could it be too lean? Please help! Thanks.