STUD1Y
+1y
you would get bind in the middle pivot if you run that same item on both sides.
as the axle moves from an upwards position down, it would force the lower pinned bar out. having the same effect on the other side, would then put them as opposing actions and thus create bind in the center piviot...
I think. I tried drawing it out to see the forces and I think that's what you would end up with if the lower bars are longer than the upper bars as you have drawn, if the lower bar and the upper bar were mounted in a vertical line you wouldn't have the issue.