Stodr,
Actually the Muzzy ZE working properly on a bow DOES have to do with the limbs.......
The ZE is driven to it's high and low positions by the amount of cable slide travel a given bow has.......this cable slide travel distance is controlled in part by the amount of limb tip travel from static to firing positions.......
The ZE only has so much built in leverage that allows it to work with small slide travel measurements.
It seems about the minimum for proper function is about 1.5" of slide travel.

I remember Pat saying that the Patriot he "THINKS" has at least that........This is also an issue for me as I am planning to install my ZE on my Patriot when I recieve it.........and I'm having my doubts.
I just can't see that slide moving very far at all. The rest barely had enough leverage to accomodate the Mighty Mite and Tech 29, so I'm hoping it will make it.