Yes, do what you please :) Can always work out any "faults" in the line as you see fit.
But for what you are looking for with him, what to clean up..
I would have to say the fins are the main priority first.. they are a bit messy on the edges, the anal is a bit long, the tail a bit short.. nice wide dorsal though.
He has a bit of a spoon head/scoop going on.. his topline could be a bit straighter.
Butterfly pattern is a bit sloppy too.
It depends on what you are wanting - color wise - that will help with the girl. As far as her looks go, look for one with nice tight fins - not too long of anal fin, a wide dorsal to match his.. and a nice tail. Hard to get a 180 spread female HM, but not impossible.. so would try to get one as close as you can, and a little bit longer on hers will help bring out the shortness of his in the offspring. Her topline should be as straight as you can find.
If you are wanting a butterfly pattern, try to get one with the girl and try to get it as even as possible all around.
If you are wanting to show the babies down the road, either first or second, third generation, etc then it's doable with the right girl. But if you are breeding just for pets, then you don't have to be *as* picky.
Breeder so I have too many to count and too many named to list here!