Hi Richard,

Our powder diffraction station, SSRL Beam Line 2-1, has the highest 
angular resolution of our 3 diffractometer beam lines, but it has only a 
2-circle diffractometer.  You experiment sounds straight forward, but 
likely requires a 4-circle.  I have a diffraction beam line meeting with 
staff scientist today and will bring up your experiment.  I will get 
back to you with a recommendation by tomorrow.

Regards,
Bart