Howdy. Looking at an i7 MBA to replace i5 2010 MBP. I need to run snow leopard from time to time, which I currently have installed on a partition on my main drive. If I got a MBP, the plan would be to have the Snow Leopard drive on a USB 3 external drive. Will the MBA happily boot into snow leopard from a bootable carbon copy cloner drive over usb 3? How would it run? I will probably take a drive into the mac store to give it a try myself, but I thought someone here could save me some time! Thanks.