Mike,
Agree with Swiftman, if you want a squeak free ALKO stabiliser - the tow ball and the pads in the coupling head must be free of paint, protective plating or grease, etc.
We have a Brink removable on our C270 - with 13 pin Euro electrics - which really is removable (stow in the gas locker) as opposed to the factory fit, which swings back and up under the bumper. Both types need the mechanism cleaning on a regular basis, and I lubricate the mechanism with White Lithium Grease - Halfords sell this in a spray can - and it works fine on the steadies too.
Incidentally, love the 13pin electrics - never had any problems with cleaning or poor contact - the pins are heavy duty plated to protect them from european levels of road salting, the twist lock mating system means it's water-proof and that you are guaranteed a connection. And since our van has a 13pin socket, it made sense anyway.
Robert