Looking at picking up a used GS911 for my K1300S. Any issues with transfer of ownership? From reading on their website it looks like older models required a login and a password but newer models only need the serial number and checksum that are on the units label. I would think that as long as the unit I'm looking to buy has the serial number and checksum on it that anyone would be able to download updates so buying used wouldn't be any problem. Is that correct? Anything else I should be aware of? Thanks!