andy.... take that 2speed clutch look around the edge... you will see a small pin in there somewhere, with a small nail or something lightly tap it out and the shoe will come out... now clean the inside and then take the pin you tapped out and put it in the hole in the shoe it shouldnt be a tight fit... if it is clean it or make the hole bigger.

this parts gotta be the most simple part of the cen, theres not much that can go wrong with it(or is there)