dan it would fail with no metal lines if done proper mate, not having a dig just food for thought, all my cars pass that way too when i cant be arsed to fix em, dont mean that i would use something that is blaitantly a fail to get a friendly mot person in trouble or cause a issue i the interest in "bling"

use rubber pipes under the car for all i car, just dont cause a huge fireball when i look in my rear view mirror ( as we all know you drive too slow to cause danger to any person in a fast car )