We want to fit a bike rack on the barn doors of our T5. To carry just 2 bikes. Don't have a towbar. Have read several negative comments on here about the Fiamma model scratching and or working loose. But these reviews have been at least a couple of years old. Just wondering/hoping that Fiamma have sorted the problem now. Anyone had a positive experience or advice on using a more recently bought Fiamma bike rack on barn doors? Thank you.