Several guys here are telling the Barnett is slippery, 'me too'. Mittzy, what did you do besides installing the Barnettplates in order avoiding slipping ? I say so because one can notice the inner size of the back frictionplate of the barnett doesn't match with the stock one innersize incl. the anti judderwasher/spring and also one can notice after installing the Barnett the pressureplate has a bit deeper position as before.
Last issue became neutral with mr. Barnett, I had to force it for 'kicking' into neutral' . After removing mr. Barnett and putting back the stock plates, everything was working properly again...