Thanks for your comments, I am working with what is available, right now the Stabila construction level is what is to hand, if a more accurate one becomes available I will re do the job. I did however find that the tailstock end was out by 4.25mm which was a surprise.

The original Maximate stand is not bolted down, it is loose standing and on a clean concrete surface, its firm and does not rock or move.

Thanks also for the mention of Taper as against my Run Out, bit by bit I am learning!