Tony,
Does the slave have an adjustable rod on it? You
should be able to control the lengh of engagement by adjustment. It could also be that your slave is mounted to far back and it allows the MC to push fluid past the O ring seal on the slave. If it is this way then the system is stressed to get the clutch disengaged. I would say it would be about 100 miles and it would start to leak.
Hersh
