Equal Distance of hole position

[[ma...]]

I am trying to measure the Equidistance of two holes to the centre of a hole , I can calculate it by measuring each hole individually away from the centre in X+ & X-  and taking the difference away from distance    quite easily,  measuring the 

[[Ma...]]

Just measure 2 individual circles/cylinders and make symmetry contruction from them. Then this symmetry use in symmetry callout. But you have symmetry calout only for a slot - which can be done by symmetry point or that construction described above, just with points.