I just purchased the 2-year service plan extension for my RX65 from Beltronics website. I figured for 30 bucks and already getting selfcal/service required messages after about 10 months, I'd have to be an idiot not to get it. I was not asked to supply anything but name/address/payment info. I thought for sure I would have to fill in serial number, etc. How does this work? I figured many of you have purchased this protection agreement. Thanks in advance.