Thanks for the quick reply. What makes me suspicious though is that when the car is unloaded, the valve lever is at it's centered or neutral position. I could adjust it to kick in sooner, but the lever would then be off center quite a bit. I would tend to think the valve is designed to sit with the lever centered. So that makes me think it has some wear and why I'm asking the question about how sensitive the valve should be to lever deflection.