Has any one ever tried to use one of those car racks that gets attached to you car trunk? I read/heard that its not advisable to use. But looking that the specs of those on Amazon says the capacity is 2/70lbs. basically 35lbs for each bike. my Ebike is roughly 50lbs. if i only load up with only my ebike it should theoretically it should be fine right? I could even going as bare as taking off front wheel, seat, and battery to reduce the weight. thoughts and/or suggestions?