Originally Posted by JLarson

Unfortunately the FARO arm isn't that precise. I wouldn't trust it for anything less than .001.

Most interesting piece I ever worked on was a titanium transmission frame beam for the S92 helicopter. It has center holes for bushings, vertical and horizontal, with a positioning requirement of .005 relative to 3 datum surfaces (1 of which was technically inside the center of the part... frigging engineers) and I had a 25 year old CMM to do it with.