Oh...One other thing is that I'm not sure about the best way to "lock" the shaft with the max prop. For years I just shut down the engine and left the tranny in neutral, but now I'm shutting down when in forward and then putting it in reverse thinking that maybe there is more friction on the shaft allowing the max prop to feather better. (borg warner velvet drive) ??
We have been using the zirc fittings to re-grease [even underwater] and they work great.
Also regarding feathering the prop, the best practice to my knowledge is to stop the engine with the trans in neutral and then once the engine is stopped move the trans to reverse. Once the prop is feathered we put ours back in neutral. The shaft should not be spinning at all at this point.