I posted a problem with my force feedback stick recently. I was experiencing loss of control and speed/ throttle. My FA-18 was very unstable after reaching moderate speeds and would spin wildly out of control. I found another F-18 that was rock solid  any speed. I copied air file to the unstable and it is now stable, any speed any alt. I then d/l air edit prog as air file seems to be the solution to my problem. However I am unsure what specific parameters are critical and need tweaking to resolve the problem. What I find is an alt/ speed relationship. I have a loss of control above a speed, nose goes vert  until an alitude increment is achieved then acft is stable. Question? ............ What are the significant aspects that might be tweaked in air files?????????