Oooh so close! I’m having 480cc UHP overs on the 6th of August 🙂 I was panicking about mine being too big today so I called Kimberley, my PC, and she really put my mind at rest. 510cc isn’t massive but it really depends on your frame and how broad you are etc. I know people that have had 375Cc and been a E cup, and I’ve known people that have had 500s and come out as DD! I don’t think you’ll regret it, they’ll look lush 🙂 where are you having your op? Are they over or under? Xx