I've temporarily put my RCD510 back in but when I swap it with the RNS, I was going to video it and show how it is literally a 5 minute job. If p3eps doesn't have any pics of the small ledge for the GPS I'll include it in the video.
I'll be swapping back to the RNS tomorrow, so I'll take a pic when I'm finishing my how to.
I also fitted my Micro Road Pilot which has a GPS antenna - which I put at the other side.
Its obviously not as good having the antenna's under the dash as it would be having them on the roof - but the hour I drove about with it under the dash I had 7/8 satellites most of the time.
I took out the climate control for putting my Fiscon box in behind as there is heaps of room, and it means you can push in the RNS and pull out the cable at the same time.