The cable adjustment only takes care of your free play,the distance between the throwout bearing and the clutch fingers.As the disc wears the engagement will be closer to the top.When it is really worn the engagement will be right at the top and will slip.As the pivots wear in the pressure plate they will drag,hang up,and make for a stiffer clutch. A stock VW clutch is probably one of the easiest clutches there is to push.Some people go with a heavy duty clutch thinking,that will last me forever.It might but it is stiffer too.I think you need to try a couple first before you invest many hundreds of dollars in a hyd.setup only to find you needed a $79.clutch.
