Uncle Gene, Uncle Joe, and Dad

My Uncle Gene was a Tractor mechanic for Ford tractor company before he retired and was legally blind. He could tell simply by touch the size of a bolt of nut or wrench and he knew Ford tractors inside out and top to bottom. I spent a summer with him years ago and was amazed at his knowledge and skills at fixing tractors. I was amazed because I had to read telephone numbers to him and things like that but he knew how to fix everything that rolled into his shop. He could read but had to use a machine that had a camera mounted over a table that magnified the image 10x or more.