Thanks Robert. I am trying to find and chat with local Audio specialists (one of the local ones here in Wyndham hasn't got back to me) - and I've done a lot of research on-line till my head is spinning. I will be going down to see if anyone at A'bahn has expertise in this today. As for the wiring and harness, I have many years of experience fitting radios etc to the various cars I've owned and I have spent most of my life making electronic stuff and soldering - I was a radio ham for many years before coming to Aus. So making up a harness is a fairly simple job IF (and a big IF) I can get a correct wiring diagram of the unit and the ability to buy the relevant plugs and sockets for a harness. I would rather just buy the correct compatible head unit and the harness and facia surround. Questions I want answers to is, as I use an Android phone, whether the head unit can be a plain Android 10 system or must it have Android Auto specs to be able to stream/mirror my phone for nav maps (eg Waze and Google maps)? I presume, if the head unit can have these installed I will only need to use the phone as a hotspot for the maps to work live. As my current system already has DAB+ built in, must the new head unit be DAB+ compatible or does it just need to have a 2nd USB port (for a DAB+ Box - to be purchased) and have an app like DAB-Z installed? I don't have experience in these apps. I think these head units all handle the phone connect for calls and reversing camera, so really the only other specifics I want is current free maps and the DAB+. The system in the car now doesn't have a separate DAB+ box between the unit and the antenna. It looks as though the unit has the DAB built in. I might take a look later and see if I can pull the DAB out of the unit but I don't think it would have the necessary USB plug on the one end for me to re-use it. So it will probably be a lot easier to just buy a new DAB+box.