I am wondering how you know if you are within the weight limit on your suitcases before you get to the airport. I am always concerned (especially on the way home) that I might have to pay excess charges. I was considering one of the fisherman type scales that are small and could be packed in a case, but all the ones I find only go up to 22kg, and the weight limit is now 30 something with virgin - I am not so concerned going out so wondered if I might pick up one of these at walmart that would do the trick!