Maxxair Vent Covers

I have Model Fan-Tastic Vent w/Rain Sensor w/Travel Lock vent Fans with powered covers, etc. on my 2017 Newmar Ventana and want to install Maxxair covers. Maxxair offers 3 models including the original Maxxair, Maxxair II, and the Maxxair Fanmate. Can anyone give advise to which one will accommodate the auto cover on my vent van and is best for the Fantastic fan?