Tooling Ball Lengths are greater than 2 microns, look at data!! 
Detector Length Diff  PD1 = -0.0008,  PD2 =  0.0005, PD3 = -0.0004, PD4 =-0.0025 

     X          Y          Z        Roll     Pitch    Yaw  
   (mm)        (mm)       (mm)     (mrad)   (mrad)   (mrad)
 333.0897   262.7543   253.0580   -0.0009   -0.0005   -0.0024 
 333.0897   262.7543   253.0580   -0.0009   -0.0005   -0.0024 
-0.33309   -0.26275   -0.25306    0.00000   -0.00000    0.0000 

              X                   Y                    Z 
             (mm)                 (mm)                (mm) 
Centered Tooling Ball values wrt Magnetic Center 
Raw      167.2934             173.0794             -0.4040   
Mechical 167.3215             173.0424             -0.4293   
Diff     -0.0280              0.0370              0.0253   

Centered Tooling Ball values wrt Mechanical Center 
Quad Roll 167.3582             173.0794             -0.4108   
Mech      167.3215             173.0424             -0.4293   
Diff       0.0367              0.0370              0.0185