I found this thread very helpful for getting my vc up and running, thank you @Tin82 for an excellent write up. Just a couple of notes that may help others.
Amundsen
I do have an Amundsen (MY18 car), you may need to update the infotainment units software but once you do the only difference in the coding is the following adaption on 5f
ENG122230-ENG142097-Dashboard_Display_Configuration-ability_switch_nav_maps,ON
Amundsen cannot show the map on both screens so you need to enable this to get the button that lets you swap between the two.
Cross road adaptations
Don't panic if the following adaptions fail:
ENG122230-ENG122340-Dashboard_Display_Configuration-crossroad_detail_map_compression_mode,H264
ENG122230-ENG122344-Dashboard_Display_Configuration-crossroad_detail_map_resolution,resolution_3
ENG122230-ENG127006-Dashboard_Display_Configuration-crossroad_detail_map_transmission_mode,MOST_streaming
They didn't work for me (possibly due to lack of A5 camera) just carry on with the rest.
Sport Mode Dial
The aliexpress sourced VC I used did not have the big central single dial 'sport' view when it was first fitted but the following adaptation on 17 makes it appear
ENG98918-Sport
Component Protection/Online coding/ODIS
If you don't fancy going the online route (getting a VAS5054a can be expensive) a decent independent VAG specialist will be able to do this bit for you but make sure ahead of time they are comfortable using the advanced features of odis, the guided function will not work for chinese vc + european car