I need some help with a program I am writing on our Leitz to check the probing error of each stylus and volumetric error of each stylus back to the master stylus. I am using a Ø25mm ceramic sphere as the artefact. Probe is an HP-S-X3C.
I am starting with touch probed sphere for each stylus (4 levels, 29 hits), then a scanned sphere (360° circle around the equator, then 2x 180° circles over the sphere in the XZ/YZ planes, all created with GENSCACIR, then use COLAPT to connect them into a sphere).
The XYX deviation and form & diameter for everything is within 0.001mm, except for the scanned sphere form deviation, which is around 0.005mm (using SPHFRM). Questions below;
Is the method above OK for creating a constructed scanned sphere? If not please advise.
Is it possible to graphically analyse the evaluation from SPHFRM?
I have a star probe with the working length of each stylus is only about 5mm, so I can't scan around the equator. Is it possible to scan a 360° circle offset from the equator with the correct approach/probe comps etc? Similar to circle B on the image below.

Thanks.