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

Yeah, I like that too. How do you balance the vehicle? What I mean is how do you determine the center point of the weight?Are factory jacking pads engineered for centering a vehicle's weight? I get nervous thinking about a car crashing down when pulling or pushing under there.

I don't know where to begin. First off I love your tranny jack contraption. That's what you do when you get older, you invent better stuff to safe your back and body. Second off, you opened my eyes as all you can do with a 2 post. I didn't even think about setting a body down on a trailer. Bouncing it a little to feel for center sounds logical too.
And I thought you only new electrical. Lol, thanks alot

I used a two post for decades and never had a problem with balancing a vehicle no matter what I was doing.
It just takes a little common sense when placing the arms.
Never had an arm come off during any work, but I have had one arm not be in as solid of contact with the vehicle due to different placements of them from one side to the other.
Like I said, common sense.
The 4 post doesn't really require as much.:D