I own a mini Jet lightbar with the factory magnets and i was wondering if the magnets are strong enough to hold the lightbar down at freeway speeds (65mph). The lightbar seems very secure when i try to remove it off the roof. Do you think it would do just fine if i attempt the freeway? I hear too many stories of other lightbars not holding in place or they fly off at highway speeds. Are the factory magnets rated at 45lbs or are they stronger?