Hi! I've got a 07 MBP and was thinking about getting the Retina MacbookPro. I'm kind of worried on how it's gotten skinnier. When I travel, I use a Tenba backpack. I put my laptop in this space between my back, and the compartment where I put all my camera and video gear. It can get heavy. With the RMBP being skinnier, I'm worried about it flexing too much while traveling. Anybody carry their RMBP in a similar manner? Does the RMBP look like it can handle more than a trek from the car to Starbucks? Thanks!