knuckle calibrations

knuckle calibrations

does anyone have a good write up for building / calibrating knuckles in CMM manager and UCC server? I'm struggling getting my probe to calibrate in the A90B0 orientation using a 90 deg knuckle I'm not having the same issue with A90,B90.  when i calibrate the A90B0 it shifts my x offset 3.5mm in UCC server. my calibration sphere is set to 45 degrees off of my surface plate.