Just curious how many anchor studs you have, and were they supplied with the lift? My 2 post lift has only been in for about 2 1/2 years now, (10,000 pound Atlas with symmetrical arms, and a floor plate to cover the cables, as my shop only has 11 foot ceiling, so not high enough for a "clean floor" version. I bought my lift new, and my concrete floor is only 5" deep, which was the minimum recommended thickness, and it has 5 anchor studs per side, that were included with the lift. When I drilled the holes in the concrete floor, for the anchors, I could feel the drill go thru the concrete, and into the dirt below. To install the anchor studs, it required several whacks with a good sized hammer to drive the anchor studs in enough into the holes, did your anchors fit tight like that? The instructions with my lift, said that the nuts for the anchor studs needed to be torqued to specs, and rechecked, and retorqued periodically, even the lifts at the dealership I worked at were supposed to be retorqued every 2 or 3 months. Although my hoist id rated for 10,000 pounds, the heaviest vehicle that I have up on it so far, is my 59, which is 3800 pounds without driver. My F350 Dually is about 6700 pounds, and I am hoping to put it on the lift this winter, but when I do, I will be keeping a close on the towers and anchor studs when I do lift it up.