edge sharpness tester with captive nuts

I liked leadingedges design but i didn't want to have to order those nuts. so i reworked the design for what i had, 2 square nuts and 2 socket cap m3x10 screws. I made captive slots for the nuts and dropped them in with an m600 pause at level. Interestingly they were both at the exact same spot 26mm exactly. easier than having to go to the hardware store today :)