I bought a Taft Hobbies 90mm viper from KMP. The first time I flew it, it barely had enough thrust to get off the paved runway. I put a thread out asking for advice.....several guys told me to " calibrate" the throttle, which I did. Better, but still not very fast......one of my club buddies downloaded the ESC manual, and tried to program it to get more thrust....not much difference. I am stumped. I see videos of this jet, and it seems quite fast......mine is a slug! Help,