right then, for the fiber manual advance gear you do need the right tool. mine was very specific, requiring the ordering of a new tool, so you may want to go ahead and start that well before the next free moment you get (can you tell I feel your pain ;-) )
I got mine thru domiracer (if you're in the US) without too much trouble, and I can tell you if you're taking it off, you'll likely have to pull it a few more times in the process of retiming!! its good to have the right tool so you don't break the gear or bugger up the threads for next time.