What additional surgery would be needed to achieve a more symmetric, flat chest? (Photos)

I had gynecomastia surgery about three years ago. I paid quite a bit and the results, though an improvement, weren't as great as I was hoping for. One big thing was how they weren't symmetric. I followed up with the doctor and she suggested for another $1000 she could go back into the right side.. make a small incision below the nipple.. and remove skin from there. I don't really care about scarring. Ideally I would like them as flat as possible and symmetric as possible. .