Keith;
What is the hole size? If the holes are lets say .500 +/- .020 (-A-) and .250 +/- .020 (-B-) and they are .480 and .230 the holes must be positioned perfectly, But if the holes are .520 and .270 you get a tol. of .080 (MMC) ? I thing this is right. And per your sketch -C- is no longer in the equation?
John D. Ruys
CMM Programer/Inspector
Teledyne MEC