Phoenix 5 - Control Menu

[z0m8i3]

Can anyone explain what all the new settings are in Phoenix 5. For example in the new expo menu you have several expo's now, why?, you have "Expo" / "Low-Rate" &
"Expo (Low-Rate)", what the hell? what do these do now?.

In the Control Menu you have, Throttle, Elevator, Aileron, Rudder, "Collective"?, why collective?, whats that for exatly?

Appeciate any help.

Sam