yeah they do have holes down the centre... it's all sweet now. i had a mechanic mate look at it and said that someone tryed to take it off before with no success, so i'm guessing it would have happened anyway. Im just a bit scared now cause the gearbox and clutch feel very different. Clutch goes from feeling soft to feeling hard etc and car feels a bit slower for some reason. any suggestions?

they are just one of those things that need to be taken off & thrown away, there are replacement slave cylinders assemblies that are much better than the stocko,also have more throw than factory units. they are also prone to coming loose, needing loctite to keep em tight ,but $250 to pull out the box..... he saw you coming, its only 10 bolts and can be done in a few hours by the average backyard mechanic, I wouldn't go to him again

try givin "Mal Wood" a call,he may be able to advise of a solution,sory that i dont know his number