Cara, my first fill was 2.0cc and I had a little restriction for maybe a week? So I went ahead and got my 2nd fill and had a total of 3.2cc which was a tad to tight but loosend up eventually ... after 3 month ... to the point I had almost no restricton again. When I went for my 3rd fill I only had 2.4cc of the 3.2cc left and got a refill to 3.0cc.
When I asked where the 0.8cc went, the NP said that usually she can't get all of it back out, since some of the fill is in the tube and some of it simply dissapears ...
If 3.0cc fill is what is right for you .. then so be it ... we are all different!
The 4cc band actually holds MORE than 4cc, so don't worry for now that you run out of space LOL
YAYYYYY to restriction