The Advantage lifts come with diamond stamped aluminum ramps. My 10year old is able to move them and install them when ever they like. They will all have safety locks. If you notice though in the pictures above of how they are constructed I would lean toward (which I did) the Advantage for a more solid construction. The Advantage posts are boxed on all four sides where as the Direct pictured (and many others) are not. Also you can see in the pictures that in the lifted position The Advantage post is also boxed completely by the cross beam that keeps the lift together. The posts then ride in the middle of the cross beam box ends as it goes up like a cylinder. Inside that box is lined with a teflon material to slide up and down the post. The posts can never walk out this way.
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