When creating a cavity in one part using another and choosing to scale it, the results are not what I expect. For example, the cavity bellow is uniformly scaled 10% about the component origins. I'd like to have the cavity scaled around the center of each feature independently so that the holes are centered. And the scaling of the cavity for the holes is reversed to what I expected, growing outward instead of getting smaller.

How would I correctly scale a cavity so that it is uniform and for enclosed sections to shrink instead of expand?