This is a combination tool that serves for TAMV (Tool Alignment with Machine Vision) and ZTATP (Z Tool Align with Touch Plate) tool alignment.
There are two models. One for the LM8UU linear bearings and the other for the longer LM8LUU linear bearings.
Both versions share the same base, mag_filler, and landing pad parts.

The Knob sensor uses an 8mm aluminum rod with a 3mm hole in the center drilled out to 3.3mm and M4 tapped at both ends.
https://www.amazon.com/dp/B09FJD7XVD?psc=1&ref=ppx_yo2_dt_b_product_details
The aluminum rod could be replaced with a printed 8mm shaft and a 4mm insert at each end.

The knob is metal, 15mm diameter top and has a 16mm shaft.
https://www.amazon.com/dp/B00A9NHWBI?psc=1&ref=ppx_yo2_dt_b_product_details

It also needs
7 - 3mm inserts
7 - M3 x 8mm Flat Hex Head Screws
1 - 4mm insert
1 - M4 x 12mm Hex Socket Head Screw
1 - M4 X 6mm Button Head Bolt
1 - M3 X 6mm Button Head Bolt
3 - 8mm M3 metal threaded balls
3 - M3 x 6mm flat head bolts
1 - M3 fender washer
1 - M4 fender washer
1 - M3 square nut
1 - spring from Anti Backlash Nuts
https://www.amazon.com/dp/B07XYQTR65?psc=1&ref=ppx_yo2_dt_b_product_details

The landing pad assembly has about 5mm of adjustment for spring tension adjustment.

You will also need my modified versions of TAMVZTATP_GUI.py and DuetWebAPI.py that can be found here
https://github.com/warpster/TAMV_ZTATP

Place the TAMVZTATP unit in approximately the middle of the bed and face the X+ marking towards the X positive direction on the bed. Locate the Z endstop, without a tool loaded, above the microscope portion approximately 50mm above. Configure the Knob sensor as Probe K3 and add the appropriate config.g line to define the probe.
example
M558 K3 P8 C"^io5.in" F200 H50
G31 K3 X0 Y0 Z0 ;make sure the sensor is configured as K3 or the z will not get set.

This works just like TAMV alone except that after setting the control point it wil move 40mm towards X+ and set the base Z alignment and then will load the first tool and after aligning the X and Y for the tool it will move 40mm in the X+ direction (over the pad) and then zero the pad before getting the next tool, etc.

This is based on the original Jubilee holder 3D files located here
https://github.com/machineagency/jubilee/tree/main/tools/machine_tuning_tools/camera_calibration_tool