Something else to check.
Check your yoke springs.
I have seen them come off and get into the gears making a clicking noise.
Makes sense. I have also seen worn pinion yokes (not enough grease) cause a curado to make some really strange grinding noises when you reeled and stopped suddenly the pinion gear would keep spinning on the yoke after you stopped making an odd noise. I had to look really hard to figure that one out. Was worn just enough to make a difference.