I am getting a form error of .250 on my cylinder probe using a ph20 and .006 when using a ph10 (2 different CMMs). what can i do with the ph20 to minimize the form error? i have tried rebuilding the probe from scratch with no effect and have tried using the ISO Utilities under the systems tab to qualify the probe. it only changes about .001 each time i recalibrate. We are using the latest version of the software. Any help would be greatly appreciated! Thank you!