4 post lift vs. 2 post lift. Pros and Cons.

I'll have to check my concrete thickness for sure. I'm not sure but the 4 post seems like there is more work and more weight involved in setting them up. Those are all good points you brought up and I really like the idea of being able to move the lift around. Thanks
4 posts are much easier to install. The floor can be thinner, and more importantly, the cars' center of gravity is between the posts at all times. They will not tend to pitch over. The 2 post if loaded poorly with a heavy vehicle, will have a very large twisting force on the 2 floor mounts, trying to pitch the car and lift over. So the criticality of the floor becomes much, much higher for a 2 post.

NDW I'd ever put a 2 post of any kind on a typically thin garage slab, and honestly, I' not even be happy with a mere 2'x2' thick base.....too small IMHO. I'll be putting in much larger sized bases for my 2 post, 8-12" thick and re-bar'd into the surrounding slab, and on very well packed gravel. I'll be putting a couple of Mega Cab diesels on it from time to time, so there can be no fooling around on being heavy-duty.