Also, the compass used for calibrating the gyro is pretty small and wobbly. I really doubt you'd be even be able to read that minor difference off it. Edit: Ju

Also, the compass used for calibrating the gyro is pretty small and wobbly. I really doubt you'd be even be able to read that minor difference off it. Edit: Just read here that in the pacific Northwest of the US there is a 20 degree deviation! I had no idea. Where I flew it was a degree at most.