Cam pully assembly order?

Yeah, I was wondering why the key wasn't visible there. Does your gear just need to slide on a little more?

It's was the cam being about 1/8 of an inch too far in. Had an "Oh Der" moment when I figured out why.

For future reference if anyone else has this problem, the the cam will pull out and the key will fit into the slot when you tighten everything down.