The fence of the saw was set to a frog's hair over 4mm, 4.1mm to be exact after sanding and polishing...
The saw had to be turned off for the taking of that image. I rotated the brass rod as I sawed. Had I been in my teens when doing this, I would've attempted to saw straight through the rod. Also, that's from when I made the pair at 5.5mm, and before that, a pair at 6mm. I did not follow the "rule" for those when transitioning from plastic to metal. It was trial and error, throughout this renovation, but not in too terribly many instances.
Glamour shot...
Another reason not to go past the thickness of the originals, of plastic, is to ensure that the clamping-levers will catch their stops on the housing...
