"boB"
With my CH
Yoke all of a sudden my helicopters are jerking side to side

That's weird... when you get the CH drivers installed, set all your
sensitiviy sliders in FS9 to full right then go calibrate using the CH
calibration.

The calibration screen has a very nice map grid where you can watch what
each axis does as you move it. Look for jumps or skips in movement as you
move the yoke around and tell me if you see any.

Dalli