IN response to my post about these RNS510 copies, I contacted Witson in China. Their machine looks slightly better than the Waywell version, as the Ipod connection is on the rear of the machine.
A VERY helpful company. I too was a little bit twitched about purchasing from around the world on a whim. So I asked for the name of their UK main dealer...
http://www.esg1.co.uk/volkswagen/If you're interested, they are doing the top-of-the-range stereo with 15% off!
£370 odd! bargain.
The discount code is - Witson256
Hope this helps someone
Dan