My son has an Acura MDX ( Which I believe is similar to the Honda Odyssey) and he wants to put a "s-car-go" type enclosed cartop carrier on it. The MDX has no gutter, nor any ridges etc. to which we might affix the straps. His model did not come with a car-top carrier in place. Any one here solved the problem?? Help please, as his trip approaches the end of this week. Thanks RG