Axis Calibration using Metric values?

[richald]

Yuriy, Just watched your video tutorial on calibrating the axes with a 3" 1-2-3 block -
(https://www.youtube.com/watch?v=ngX0G0Z-02s)

I have a metric 1-2-3 block 80mm long.

stages . . .
Video inch/mm set to inch, digits set to 4 places, Axis CPI set to 30000 (10,000x3") 
DTI zeroed on single block, reading of 0.5080" entered in axis CPI value as 5080

Can anybody give me a clue as to how to calibrate each axis with an 80mm block ????

Richard