I have a late 2013 rMBP. The battery health is at 90%. So, I don't REALLY need to replace the battery. However, my sweat has eaten away at the top case (I have acid sweat apparently!). It is just cosmetic, but if I could get 10% battery back and a new top case for 200 bucks, I'd probably do it. Can anyone confirm whether or not the battery placement includes the entire top case being replaced? Thanks!