can anyone tell me how many band sizes there is? I had my surgery in Mexico 6-15-07. I have lost 50 lbs. Need to lose about 50 more. Doing pretty good. I now have 4 cc's in my band. I think I could use another fill. The card that I got says that my maximum fill is 4 cc's. My friend also had hers on 6-20-07 and her card says the same as mine, but her Dr. says she has a 5 cc band. What does all of this mean?