One hint; until you get the "feel" of a mic. use the ratchet/friction thimble (little thingy on the end of the thimble) to get consistent measurements (as my mentor said "it anin't no c-clamp, take it easy!"). I used the same micrometer 0-1" Starrett for many years as a machinist, and with just a bit of practice, .0001" measurements are easy...