I wasn't
if you can put a band expander into it then you are pretty much done. out with one section and in with the other. the navi unit plugs in. there are a few spare leads left over from the TV side of things but thats it. the LED's - pass. too many and way too fiddly for the average punter.
only minor downer is the lack of AM. FM is useable.
chipping the radio was something I was working on and I cannot get the thing to stop drifting off the station..