A few nice turning machining images I found:
Counterbore for the centering ring
Image by nebarnix
To fit a KF16 centering ring
Tapped holes on jig
Image by nebarnix
And a better view of the expanding arbor post on the jig
Bell Jar Anywhere V1.0
Image by nebarnix
Testing the fit with a vacuum gage because I’m lazy.
Counterbore for the centering ring
