Making the female portion of an injection mold from the male piece?

I am relatively new to solidworks and was trying to make an injection mold. I made the male piece using multiple planes and using lofted boss/base but now I want make an identical female piece that is offset by .6mm. I adjusted the sketches on the planes to account for the difference and did a lofted cut from a solid block, but the cut was not uniform to match the male piece (variations in the gap difference). Any ideas how to get the curves to be identical, just offset by .6mm? I have attached the male part.