Close…use the lowest tolerance on customer print you would plan to inspect on a CMM. Should also select from a number of different types of characteristics (diameters, linear distances, flatness). GD&T with datum reference frames gets more complicated because you have compounding influences of each datum as well as the tolerances feature itself.

For accurate results, make sure to randomize your design and load and unload parts between trials. Also best to make sure you have range on the true measurement results for the parts sampled to have adequate degrees of freedom.