273 302 318 340 build

Good eye. I'll chk my notes after work to see what I scribbled down, and remeasure to be on safe side (more than likely human/me error)
Thanks again nm9!
Not necessary and can be off if you don't have properly calibrated equipment or of you are a bit off on setting the measuring equipment.

BTW #2 main is .005" different from the other 4. Typo?