I have come across this several times now ... I am missing the eye aimer bone at Green Monkey. Isn't there any? Am I supposed to control his eyes just with the (master) eye target(s)?

If I recall, it seems that some of the models require the FACE graphics to be switched ON in order to get the eye aimer bone to show up - perhaps this is the problem ? I don't have green monkey downloaded to test.

I actually do prefer using the master eye target null tho, I have noticed that in some of the models it has better range