Hi! I wanted to offer my insight on your question. Due to a very clean diet and lots of ab training, I've managed to get a 6-pack. I've also managed to make my waist thicker than I would like. That I attribute to lots of weighted oblique work. I've actually eliminated using any weights when I work my sides. I still use weights when I work the front...that has helped me develop the thickness in my 6-pack. I personally find that pleasing. I'm proud that it will show through a form-fitting shirt. So, my advice would be to monitor your weighted oblique work closely. Measure your waist every so often. Even when I'm competing and at my leanest(8-9% body fat), my waist still measures 28 inches. To counteract that fact, I work my shoulders and back (lats) extra hard to create the illusion of a smaller waist. A lot of explanation, I know. Probably more than you wanted to know, but one more perspective for you. Happy training!