Erm, i tend to name them as a pair, my first pair were called "primo" and my second when i buy them later today will probably be called "Duorum". Kinda alternative words to one and two respectively.
Well, if nike + can charge you an extra 10 or 20 quid for printing on a logo/ phrase of your choice i don't see why i can't do it to my own for free! lol
