Multi Infinity Stops Engraving

Each Byron is converted by clients' requests, especially for the lenses they picked. Different combinations of brands and types of lens, shutters, it definitely needs each lens' infinity stop be measured specifically.
After individual measurement for each lens, then the i.stop engraving work needs help by my mechanist.
First, a special T type lathe knife was ordered.

The knife will engrave the plate a 1 mm width ditch, to keep and hold the front standard on location. Measurements are precisely down to 0.01mm, and with a CNC lathe machine, that will do the job very well.
Secondary, my mechanist made a fixture tooling, to hold the plate in fixed position.

Fixture tool firmly holds the plate in vertical position, and knife lathes tiny ditch according to the measurements.

Then the plate is engraved the digits of focal length by the side of ditch, for identification. I need some more practice of engraving......

For my own reason, to ensure pairing the plate with matched camera body, I engraved each owner's name on the back of the plate.

Then the installation, and rechecked the focus. Noticed that 90mm lens distance scale at the right side? that is for un-coupled focus.