Thank you so much for the offer. I took the plunge, now spliced and soldered and all works.
One final question (I hope). I have not managed to get the nav instructions onto the MFD (I have audio). Paul (
@Pauly) had a look when he coded my headlights but did not want to mess round to much. He said you were the man.
You guys are so helpful I hope somehow I can return the favour.