Originally Posted by
staehpj1
...
The linear measurement is hard to do wrong.
I would need really strong reading glasses. Over a 12 inch length, 12 1/8 would be 1 percent, 12 3/32 would be 0.75 percent.
I used to do this with a 36 inch steel ruler but it was a hassle to take the chain off for a measurement. Then I bought one of the better chain checkers.