Hi, I am trying to understand the affect of using a hole pattern with MMC description as a datum feature reference. In the drawing I have a 4 hole pattern of .096"+.005/-.000 holes used as a datum feature, with a MMC tolerance. Then in the lower section of the part I have 2 other thru holes of the same size that are referenced off of datum A and datum B (the hole pattern). My question is when i reference the 2 thru holes to datum B at MMC, do the two geometric tolerances add up? So my 2 thru holes could move within a .020 diameter tolerance zone (.01 at LMC of datums + .01 LMC of 2 thru holes)? If i put regardless of feature size will this eliminate my problem? Where Thanks in advance.