Breaking arms?
It's so rare I break an arm, especially an upper one. I can only imagine you may have something installed improperly or something. To break one every week? wow, that seems way different from anyone I've ever known to have any Schumacher. I hope you are able to figure out why you are having this problem. It's really a great platform to race with, by far my favorite of the cars I've raced/built/etc. myself. One of it's strongest selling points is that the car rarely breaks.