Zacuto's introduced a new CheeseStick bar for the Z-EVF that will allow more flexible mounting options. (surprised it wasn't named something like Z-heesestick?) Instead of using the lonely 1/4-20" thread below the Z-EVF, you'll now have a variety of mounting points along the top or the back (depending on how you install the cheesestick). Found below
Zacuto Z-EVF CheeseStick Mounting Bar