Hello, I have an E400 Coupe. She's great, but I am struggling with trying to carry a hardboard SUP. I called the dealerships and they have discontinued a roof rack for this car, and the after market is getting up to 900. I bought a SUP from a shop and they put these odd adjustable bars on my car, gel pads sit on the part that would nornally have a rack screwed into as he was concerned about the weight rigth on the roof. I've used this a few times, but it's awful as you have to tie to rack to the car, then tie the SUP to the tied rack. Lot's of ties

. .So, I wanted to see if you guys think I can simply use quite a few foam blocks on the roof and just tie down the SUP (weighs 35lbs) to the foam blocks without doing anything stupid to the roof. I think the shop avoided that due to liability, but I'm thinking, it's only 35 lbs...surely that's okay on the roof if you keep the sunroof shut? Thoughts appreciated!