To add a photo for graphic effect of part of what Ben is saying above, this pic is obviously looking straight down onto my blue-ox ( I have the old style, that has adjustable angle of the head ).
I did an eyeball kinda measure with a couple of straight edges, and it appears the center of the trunnion pivots is approx 5/8" ahead of the center of the ball.
From the center of the trunnion pivot back to where the chain attaches to the weight bar is 29", so I'll leave it to one of y'all to figure the angles and effective length changes and all the force vectors (what's our vector, Victor ? Got clearance Clarence ? roger, Roger ).
