I'm not sure about the Muzzy ZE...I've heard nothing but good things though.
Personally I think there too much going on there with that rest...JMO.
I have a 4000 also and have had NO probs with vane clearance...
Is it set back as far as it will go on the riser?
Adjust those prongs if necessary.
I'm sure you've checked these during practice and what not.
Good hunting.