Thinking of putting an Al-Ko Sawiko carrier on my van to carry two bikes. Have come up with a 590 Euro price through Google - seems steep - Al-Ko website does not seem to have prices for carriers - maybe one of those situations where you are directed to a distributor, who will quote a fitted price. Can anyone give me an idea of the price? Has anyone fitted one of these? How easy/difficult is it? Any input welcome. Thanks.