radius gauge

Font was overly small on original for equation and didn't print on Prusa MK2/3 with default settings which one would expect. So I just modified using tinkercad to make text more visible.

Some improvements could still be made, but I'm just going to use as-is. My caliper has couple screws on the end that require me to jam the micrometer in there overly hard. Also don't know why they included those screw holes. The top screw hole makes the item more difficult to print and likely leaves sagging loops near the hole that need trimmed away.