Dial mount for cnc machine (for measuring backlash)

I purchased a Kinex 1155-3 0,001mm "Messuhr"/ dial indicator to measure the backlash on a BZT cnc machine. Knowing the backlash allows for software compensation when milling. This is a prerequisite for milling round circles and threadmilling. The part allows for mounting the Kinex dial to 43mm "Eurohals" mounts commonly found on many cnc machines in europe. While the dial fits snuggly, it can optionally be secured using M3 screws.

Be warned - this isn't a novice print.
The following Cura sl