When I installed my two post I didn't use epoxy on the anchors down in the concrete. So the anchors took some tightening for the next two or so years then finally locked into place. When I had garage built I had them put down 3000 PSI concrete 6 inches thick but it seemed a lot thicker when I drilled for the anchors.
Other challenge I faced was cracks in the floor that showed up shortly after garage was built. But they are far enough away from the anchors to be safe. Lift has been installed around 10 years now.
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