Typically the slider that you can attach to the cab doesn't give you the wider surface you need to side across a thick carpet.
Using too good of a slider might give you stability issues while playing your game.
You want your game solid enough to stay put during a heated game.
You might want to experiment to see what works for you.
Personally I have used cardboard to help slide a game about on industrial carpet.
For me the game stays but when I play.