I posted yesterday how to calibrate the rods for my 0-3 starret depth mics. I foind the wrench and adjusted the screw and now on both 1-2 and 2-3 rods i am off a thou when i measure in a middle number on the spindle. For example 1.588 ill get 1.589. And then as i get lower on the spindle it will go back to about a half thou out. I am dead on when i measure the nominal 1” in the 1-2 and 2” in the 2-3. Does anyone have any ideas to get this to read within a half a thou? Id like to get it as close as i can even if im doong hobby work right now.