Did any of you have trouble with insurance letting you get a new pump after the 4 year mark if nothing was really wrong with your pump? We just expired our 4 year warranty and we would like to upgrade to the 723 Revel because my stepdaughter uses the 522 right now. She's almost 13 and uses more insulin than the 522 holds. It would be nice to get the 300 unit capacity. Plus I would like to upgrade to the newer system. I hate to have something go wrong without a warranty too. Medtronic called and kind of warned me that our insurance might not let us get a new pump now. We have Anthem Blue Cross Blue Shield.