Got it, thanks. Worst case you’re rotating a couple tenths of a degree over the length.
I am beginning to see what you’re saying.
I put a dial indicator on the X and Y axes this morning. In inches, jog +10mm, jog -10mm; I’m seeing repeatability within half a thousandth (0.0127mm). Same result with 100mm and longer jogs. The steps were very close too; jog 10mm/0.3937″ and I repeatedly got 9.9568mm/0.392″. Rapid traverse up to about 8000 mm/min is perfectly smooth.
Pretty impressive result.