I am sure others will be along to give sound advice as well.
My 2 cents would be, that it is going to be quite a handful to load with the amas on, I certainly wouldn't attempt it single handed. My other concern would be how far apart the roof bars are?
I am not familiar with your car, but I transport mine on an old Jeep Cherokee with the roof bars at the very front and rear of the roof (possibly 8' apart) and there is still quite a lot of it overhanging the rear, with the bows flush with the front of the Jeep. If they are too close, it is going to concentrate a lot of stress that may damage the hull, also it will be unstable once some airflow gets under it on the move. There is also the issues of whether it should be transported upside down rather than right way up?
I take the amas and akas off and carry as much weight as possible inside the car and just carry the hull (upside down), amas and mast (complete with sail in its bag) on the roof.
Another question is what is the recommended maximum weight your car can take on the roof, most of the larger 4x4's / estates don't recommend more than 100 lbs max.
Hope this helps.
thanks for your advice, the problem i have is that with the mast and the hull on the roof, there is no room for the Amas as the car is not very wide. I'm also not sure if they will fit inside the car.