Anyone had any experience installing a two post lift. I bought a Dannamar 10AC and am at the point of anchoring the post to the concrete. I am not sure how well the anchor bolts work, but it has a sleeve that eventually spreads over a flared end of the bolt and jam it in the hole. It looks to me like the bolt would rise up out of the hole a good bit before the washer pressed the sleeve down enough to jam it, unlass I am not understanding how it works. Any guidence?