That's because your machinist is used to being forced to go oversized in large increments. I can make you a set of .002 overs if that'll get rid of the dip there the top rings used to land. Or .003, or .004 or wherever the bore will clean up.
That's one of the cool things about my slugs, you don't have to pay for a bore job to clean up a bore. Just hone it clean and go from there. I can also move the piston up so if you're trying to get some quench and extra compression, you don't have to pay to deck the crap out of the block. Those two things alone practally pay for the slugs in machine shop savings.