Jaegers 6" f/10 "GJD" OTA Construction - Knife-Edge Baffles (3rd knife-edge measured - back)
 

Checking and verifying knife-edge opening in third baffle - 22 (Click to see an enlarged image.)

 
Awesome! Another perfect cut! Measuring of the clear aperture of the knife-edge shows that I was spot on, producing an exact 4" inside diameter opening, per my ray trace specifications.