Hi, I looking to replace the RNS-E disc 2007 to something newer 2011/12 Like most people my first thought was to look on EBay. A number of the discs offered were called updated is it possible to update an existing disc. The newer discs offered seem very cheap given the cost of these new from main agents. Will an updated or copied disc cause damage or problems with the unit. I am not just looking for a cheap replacement but a genuine used at a fair price. Thanks.