It's fairly high. Not right at the top though. As far as I know it's on the original clutch and is probably due one. Will get one off Clark mootorsport.
There's absolutely no slipping or anything like that. Just the judder under load (and not all the time). I'm more worried about breaking the gearbox or something as I will be getting a new clutch / flywheel shortly. Its just the drives I need to fit in without ruining anything!