Fitting a 3 Axis DRO to my AMA25 mill (PM-25, G0704, WM18 etc..)

In this marathon, I fit a 1um 3 axis DRO to my milling machine

I bought the cheapest 1um resolution DRO I could find on Aliexpress for my mill.
https://www.aliexpress.com/item/40011...

I paid approx £176 (US$243, EUR204 - at time of checking).
These appear to have a 1um resolution, but once i have fitted these to my mill, I will make some more accurate measurements.  I would imagine the accuracy is more like 5um - stay tuned to find out!

Edited (badly) with a combination of openshot and DaVinci resolve.