Did you take note of the G loading just before you overstress? Just incase you don't know it, press SHIFT-Z twice to see various flight info displayed in the top right hand corner. You should be able to sustain 7.0G as long as you pull out veeery gently. Avoid placing sudden loads on your aircraft, the key to flying fast jets is even, smooth control application and keeping the speed reasonable. Don't pull high G maneouveres @ low level over 450kts or 200-300kts @ altitude. As far as altering .air or .cfg files go, I leave that to computer literate ppl.    Hope it helps........