Wheeling maneuver measurer

I designed these simple tools for measuring a 1" wheel for units of square based models in tabeltop games. You put one side of the "mouth" against the side of your unit, (see image) then wheel it until the front of the unit is aligned with the other side of the mouth. To keep wheeling further, rinse and repeat.

The obvious downside to this approach is every frontage needs its own measure as how far a one inch wheel is varies based on the width of the unit, and as models die the frontage may s