That looks like the one I made out of a 2 1/2 inch PVC fitting. I just made a window so I could take the retainer off. Worked like a charm. Got it apart and waiting on replacements to get here. The metal rings look almost new. I dont think I am going to replace them.
Just for reference, this is the tool HotGlue made to compress the clutch spring so the snap ring could be removed. Hot Glue is the MAN!!!

Hay

Jimmyt