Did you ever remove the spoiler to see if you have the wiring loom to retro fit the reverse camera? I'm thinking of doing the same by adding a used genuine camera.

Wow, we're they able to diagnose the faulty injector with a leak off test or only once they had them all out? Thanks for coming back by the way

Did you solve this issue? I have the same issue, vibrations between around 50-70mph when in 5th, I don't get the problem if stay in Sport mode which didn't shift higher than 4th. Mine had a new TC last year so can't believe this has failed already.