Devo,
I'm using "Robart Variable Rate Control Valve", #167VR (
http://www.robart.com/pages/airsys.html).
If the retracts weren't binding I'd be able to restrict the exhaust air a little more to slow down the motion and the wheel would gently retract into the wheel well. That would be the most ideal and scale-like operation.
I'm going to try Paladin's trick to try to remove the binding. Thanks for the tip.
Juice.