Ratio can be adjusted "overall" but it gets down to linkage position. A lever that is at 90 to a pushrod movement has maximum leverage and minimum movement, wheras that same lever moves in an arc and say, approaches a 180 angle, now has more movement but way less leverage. So even if the mechanics are connected to hydraulics, you still need to keep the movement within bounds. The good news with hydraulics is, that when you eliminate the Z bar, you also eliminate that problem with the Z bar.
