There's a couple of new roads in Bedford still not on v16!
From memory, I just burned the file to a DVD-R, shoved it into the RNS and it did the rest. It takes ages and there is no acknowledgement it's completed either. It's a bit of a vague and crap process.
In all honesty, I get on better with Apple or Google maps. I don't miss my RNS510 one bit
I have a rubber case on my phone and just put in the middle of the clocks, it doesn't slide around. A poor man's version of VAGs new hybrid clocks