Texas,
I have a Maxjax and I love it. My concrete is about 4 1/2 " and had no problems with the drop in anchors holding at 100LBS of torque. It is rated for 6K, but have had only about 5K on the lift so far. I have heard some with old brittle concrete dug it up and re-poured 12" footing. I have 10'8" ceiling in my garage and have been able to lift all my cars to the full 48". Here are some pics, sorry don't have the SPF yet, but when I do, it will look really nice in the air? If you look on the columns you will see small magnetic levels. Before I got under them I wanted to make sure there was no movement between the columns. I set the level with a larger level dead center and not once have the bubble moved out center on the small levels. I also left the car up for hours before I got under it. Not one problem, been very happy with it. It can also be taken apart and stored if you would need to, I have not done that, no need to so far.
Craig
