I really don't want to burst any bubbles here because I think its impressive what you guys are doing! however, one thing that I have seen is the reference to maintaining weight or losing weight and increasing muscle mass. This is impossible. If you are losing fat, sadly you will also lose muscle. The whole "replacing fat with muscle" is not possible. You can make your existing muscle stronger but you cannot actually gain muscle. If gaining muscle is your goal like KurtR, then you must eat a good amount and work out too. Carbs would actually be extremely beneficial in your case. I'm talking complex carbs and not simple sugars. The only way to gain that muscle will be in gaining some weight and then losing the fat later. With the proper diet and exercise you can minimalize the amount of fat gained while gaining muscle. IE you will gain more muscle than fat. A great example is body building. The people that do this go through "bulk seasons" and "leaning seasons." during bulk seasons they eat as much as they can to put on the muscle. During lean season they restrict greatly. Although bodybuilding may seem like a bunch of air heads lifting weights, it is deeply rooted in science.