I downloaded the map TBH - I know it's a V7 though as I previously had V6 installed and some recent local road changes are now included and weren't on V6.
I'm pretty certain I need newer firmware to activate the 7 digit postcode - just a bit concerned about some of the comments I've read elsewhere, talked to VW and they don't have any official firmware updates to fix this - only option is the stuff on the web.
My units a genuine, factory fit model so no risk from it been tampered with