That's very kind, thank you Andrew.
I still have a few more things to try on 0710 before I go to 0810 - unfortunately the diff has gone on my car, so that's taking up all my time at the moment!
Regarding 0810, am I right in saying that once the correct modules/firmware for the 399Us are installed, VDR works as it should on the MDs? Or does it still require some manual configuration?