I have an '07 Toyota Matrix and have read the posts on racks already here but did not see one on trunk racks. Does anyone have any experience with these? I am concerned with the top tethers attaching to that metal piece at the top of the hatch door. Is it strong enough to tether to? Wanted to see what everyone's experience is. I have a Rhode Gear Eurosport rack, which I love, but want to make sure it will hold. I would love to use the inside car method, but I have two carseats that make it impossible. Thanks!