It appears that many users have problems with Saitek Quadrant drivers setting up the Registry incorrectly for one or more of the levers, with the result that either only 50% of the range use used or the values you get are only on (max value, 16383) or off (min value 0 or -16384).   Here is the way to edit the Registry and fix this, at least until Saitek fixes their installers. (Thanks to a main forum reply by "goaround"):   ====================================   Here is our registry calibration guide:

One way to re-calibrate your device is to reset the raw data values that are held in Windows registry.

To do this:

1. Remove the USB plug for your controller from the PC.
2. Press and hold the Windows key on your keyboard and then press the letter R. This will open the Run box.
3. Type regedit and then click ok.

For Windows Vista/7/8/8.1

4. The Registry Editor will have a list of folders on the left hand side. Go down into the following folders in order by clicking the + next to the folder name.

+ HKEY_LOCAL_MACHINE
+ System
+ CurrentControlSet
+ Control
+ Media Properties
+ Private Properties
+ Joystick
+ OEM

5. Delete any folder inside the Direct Input folder that begins VID_06A3 or VID_0738, if you know the specific PID number or your device then you only need to delete the string that matches the VID and PID.

6. Then navigate to the DirectInput folder

+ HKEY_CURRENT_USER
+ SYSTEM
+ CurrentControlSet
+ Control
+ Media Properties
+ Private Properties
+ DirectInput

7. Delete any folder inside the Direct Input folder that begins VID_06A3 or VID_0738, if you know the specific PID number or your device then you only need to delete the string that matches the VID and PID.

8. Once deleted, close the editor, then plug the USB back into the original port. Move all the axes of the controller through their full range of movement four times. This will rebuild the data range for all axes.