Nova, not to sound to geeky, but when the pressure is in the 30.15ish range the plane flies differently than when the pressure is down in the 29.85ish range. I thought I was making it up until I was able to repeat the performance. The theoretical normal pressure is 29.95. That is fairly accurate for where I live. However, I can turn and stunt better with lower pressures. With higher pressures I can make serious altitude.

Tim