Vacuum advance

Lift is a Backyard Buddy 4 post made in Warren, Ohio. I think the factory may be an old Packard plant. He toured the plant, robot welders and powder coated.
He has the optional wheel casters that allow the lift to be rolled around with a car on it, though at the lowest position. Also has a movable shelf/drip pan. No floor reinforcement needed and his is the 120v model. Very nice.