Hello Antony
The Revo rack fits perfectly on my AMG GTC. The sunroof and spoiler work perfectly with the rack installed!
The 100% waterproof bag is from ‘Decatlon’ and is called TRIBORD.
If you have any inquiries from Switzerland, please feel free to use me as a reference for your very good product!
Greetings from Muceno, Erich and Mirjam
silver AMG GTC in a garage with a revo-rack luggage rack fitted carrying a black holdall.