As you may have surmised from my handle, I run an electricity museum. One of my activities is restoring antique scientific instruments, & I recently had the opportunity to put the GF to work. I received a Voss static electricity machine (ca 1900) that had broken disks. One of the disks was 12.4" in diameter, so it didn’t fit in the bed of my gf. Fortunately I have a PRO, and using the slot was able to create a new disk. What surprised me was I got perfect alignment just using the camera, without a jig.
The smaller disk is 10.5" so I was able to do it in the gf.
I wish the gf would cut aluminum foil, but I used a stamp to cut out the new aluminum foil disks.