Per the AMA 510-A
the model shall be able to come to a controlled stop on
command with the engine at idle on a level hard surface.
If i drop my jet to idle with the skis on, it will come to a complete stop. Especially if it is on concrete or asphalt (hard level surface).
So if you put your skis on and place the plane on a level hard surface at idle it should not move.......
My R54 with skis on snow stops faster than it does with wheels on grass.
since it takes a lot of throttle to get it moving, or keep it moving, I can command a stop by dropping to idle.
On hard ice you can use wheels but the brakes will not do any better than skis for stopping.
As far as wear to the compressor, there is none that I can detect. I did a thorough check with a magnifying glass after running it.