Managed to find time tonight to complete the balance 3 pieces. It was a struggle and a race against time as I'll be involved in some events at night for the next 2 days and will be doing full day showflat on Saturday. Thank God that out of the 5 pieces of round stocks I bought, only one ended in the scrap bin waiting to be recycled.
From the exercise, I started to have a feel on how zeroing is done. The only thing left not solved is the answer to the parts being undersized. I've a feeling that it is due to backlash on the leadscrews. Though the job has ended, I'll be doing one test when I've the time - to increase the distant the tool retracts so that backlash is taken up before moving back to the cut. I'll post my result here.
Not many pics taken this session as the focus was to get the job done within the session.