Has anyone had a go at changing the laser in their RNSE unit? Mine has finally given up working completely, after several months of it struggling to work properly. I've tried cleaning the lens and the CD but no luck. I have read several posts on the Navplus website, but wondered if anyone on here has had a go at changing their's? Also does anyone know where I could buy one from, I have found a website in Germany but is there anywhere a bit closer to home? Cheers!