Measuring ER32 Lathe Collet Chuck Runout

I was under no illusion that there would be no runout, after all, its my first real attempt at making a precision tool and my lathe itself has a certain degree of runout. To be completely honest I am very happy with that runout. I'll just be conscious that if I need something with a higher tolerance, not to use this chuck. Im also no expert, so I hope this is being done right. I welcome advice if this method is wrong or ways to improve on this method. Runout measurements: Precision ground HSS 100mm in length: 12mm diameter = 0.01mm runout over 100mm 6mm diameter = 0.01mm runout over 100mm Chuck bore runout: Measured at edge = 0.02mm Measured at centre = 0.02mm Measured at bottom/deep = 0.01mm 12mm HSS in Chuck: 50mm from chuck = 0.11mm 35mm from chuck = 0.1mm 10mm from chuck = 0.04mm After turning part (12mm in chuck): 50mm from chuck = 0.05mm After turning part and collet (12mm HSS in chuck): 50mm from chuck = 0.07mm 6mm HSS in Chuck: 50mm from chuck = 0.15mm 20mm from chuck = 0.06mm After turning part and collet (6mm HSS in chuck): 50mm from chuck = 0.08mm 15mm from chuck = 0.04mm 50mm from chuck = 0.09mm (second measure) Where do I buy my tools? Lathe, QC Tool Post = https://www.adendorff.co.za Cutting Tools, Collets, ER32 Nut = https://midwaytools.co.za