...that is way too much 'technology' to test cutting depth...surely we all know what setting, 1-10, for our routine mowing...or test cut a patch...not to worry, you did not need it anyway! Cheers, and btw, my 2011 Nissan Pathfinder has the same sort of cap holder moulded into the inside(metal) panel of fuel filler door...cheers
Jim in a cold and windy weekend in Canberra, ACT, seeing some pretty great pre-Raphaelite paintings at the Aus National Gallery...