Slave cylinder throw
 

So, I've been told I have either a bad pressure plate or a bad master/slave cylinder. I put my R53 up on jackstands today and had my son depress the clutch pedal. I got 14.5mm of travel. Doesn't seem like much. The clutch depresses really close to the floor and it shifts a little hard. I'm thinking (hoping) it's the master/slave so I was hoping someone knew how far it was supposed to move when the pedal was depressed?
Thanks
Scotty