Even following the Z-Speed CSC bleeding instructions to the T, we usually bleed it a few extra times. There is also an adjustment on the clutch pedal itself that can help with low/high pedal engagement if that's an issue once you get the pedal to return to normal. It takes a surprising number of cycles to get all the air out of the new CSC lines.
Thanks,
Alex Goodwin
AlexG@motionlabtuning.com