That's mighty good. It sure does the job nicely. Thanks for the pics. Do you have any pictures of how you made them?
No pics...here's the wordy version.... I took two holesaw pieces the diameter I wanted, ground off the teeth, assembled them on the holesaw arbor. Then filled the inside 2 rings with JB Weld and then pressed in the 1/4" letter/number stamps, let dry.
Next found a piece of PVC tubing coupler the right size (1 1/8th) and likewise filled it up with JB Weld and let dry. Then marked the points of a star on the end of the PVC piece and used a hacksaw to crosscut the star points into the PVC and JB Weld. Took a knife and removed the rest of the star and then it's done.
It's not perfect...but I know it would cost Thousands$$$$$ to have a professional tool made...so this will do for me.