Niose on change down through gears

[GT290]

I have the Textralia Z grip clutch set up with the LS1 Slave. When I change down through the gears it makes a squeeking noise like a hydroulic ram would if it was bent (for those that may know it) It also does it on take of first gear. It sounds horrible and embarresing.

Has anyone else had a problem like this and what can be done.

Chris or Theo maybe able to shed some light on it? I need to have this fixed. It seems to help if I hive the car a rev as though to double clutch as I change down. It does sort of get better when warm but it seems to now do it all the time regardless.
Any help here from anyone would be great