My 4 post is an Advantage. I have noticed if I'm not pushing down on the release hard enough one of the locks might not release all the way, then when I lower it, it catches. Becomes pretty obvious, Ive done that a couple of times. It's never lifted a leg or tilted the lift but it's something that needs paid attention to. It moves so slow it would be hard to get in trouble with it without noticing somethings off before it becomes irreversible.
I've been using mine for several years and happy with it, very robust compared to a couple other brands I looked at down there last weekend.
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