I would not put the Maxjax towards the edge of the slab. I had little choice but to install the lift near the relief cut, but was lucky enough the slab was thicker than 4" in those spots. My new place, the thickness was 6" and I epoxied those anchors in.
Your right, it is at or around 4800lbs. For some reason I thought it was in the 5K range. (Maybe with all my stuff in the car it is.) I never had any issues with cracking. When I first drilled the holes, I started with a regular drill and slowly started the holes with a new Bosch 7/8" mason...
I have had my MaxJax for 5 years now and can't be any happier with it. I have had a lot of ups and downs with it. It has moved with me to two houses.
Old House set-up:
It even lifted my Ford Flex (which was at the suggested Max lifting)
Now at my new place. Just installed it a...