Sizes seem consistent, always 0.4mm larger than programmed. So far have tried contact t35, orange striped lmp and green striped GT12. Always worth checking it measures the width correctly prior to cutting a striped tire.
For anyone else interested i have tried the new hex fitting contact wheel which appears to sit ok on the main arbor but needs a spacer and the contact clamp to tighten it. I have not fitted the maim contact arbor as the alignment block will not fit. I will investigate further when i have time.
thanks, mike.