All replaced. Also replaced the O-rings at the ports on the valve body. Replaced the collets, but ended up putting the originals back in since the new ones would not hold as well. For some reason, the Rangie wanted to lean to the left. took several tries of raising and lowering the car until he finally levelled out. It was brutally cold out last night, and this was when typically I would find the air system completely discharged. This morning, I started up the engine, and pressed the up button, and the suspension rose to normal ride height straight away. Looks like the old original O-rings were getting tired. I have lots more projects, but its too darned cold out at the moment.