Not to kick a man down, but see my post #102. I had the FSM and did what you've done anyway - shame on me! Description in the FSM is not very good and didn't make sense until AFTER I'd done things that the FSM covered before it made any sense at all.I didn't find any of that info on this board or in the FSM. I found bits and pieces but yours right their is the first full description I have gotten.
I had the e-brake off before removing but couldn't find the damn sprocket through the hole. The little pins shot off of the little springs and plate. We tried to repair the little tabs that hold the pins with a hammer. But I am suspecting I need to adjust that sprocket. I assume that is my problem.