[petet16]

Ah boo, yeah, it's a box off job.

Another possibility is that a little bit of air might have got into the system when you connected the quick release coupling, something that might work is to block the clutch pedal down over night, this allows any air that might be trapped to work its way out through the master cylinder, it's a bit hit and miss wether it'll work but I've done it for brakes before and had a good result.