Thanks very much Lugnutz.

The four-post lift is inherently stable - after the four legs are held together with the side rails.

I/we will be extremely careful.
I will have one helper at all times.
At the final lift, I will have 3 helpers.

One neighbor is an EMT/fireman.
All four of us have done construction/roofing.
No beer will be imbibed until the lift is bolted together. chug