I bought 2 new R710 on ebay, and have flashed the first to unleashed and it's working fine. The 2nd should be delivered today. I'm not clear on how to register these devices for support. The only info I have is the Serial Number, but the support site seems to be talking about an "Activation Code"? Am I missing something? Is there any point in registering them unless I need an RMA? I did find an article recommending purchasing unleased support, but that's a different matter.