Hi, Does anyone uses keyboard silicon skin on a rMBP 13 ? And does it work smoothly, & without heating ? not annoying to use it in the long run? I am talking about item like these, normally meant to prevent from liquid spill http://www.ebay.com/itm/FOR-APPLE-M...6?pt=LH_DefaultDomain_205&hash=item46115f9190) I am going to renew my macbook pro (2009), for a rMBP - but due to the laptop getting much pricier in Europe.. I am considering buying one 2nd hand off ebay, but they have different keyboard layer than my home country - but i thought I can just put a keyboard skin to address that that (and adjust it in the os settings) My only worr, is that, when I tried such skins on my MBP (2009), i noticed that after a certain time (like 30min) it starts to heat up (i assume the air cooling architecture somehow transfered some air through the keys on that model? ) so I didnt use it in the end. Is it likely to be an issue with a rMBP too ? Thanks for any help you can provide on this !