There is no significant trim change from the beggining thru the end of the flight. the most significant unique flight characteristic of the roo is the pitch down tendency when you are flying at full throttle at less than cruise speed, like right at takeoff or when you abort a landing. be ready to hold a lot of up elevator in this situations without concern, because is next to impossible to overotate a roo.

about the settings, here are some useful threads...

http://www.rcuniverse.com/forum/m_32...tm.htm#3241518

http://www.rcuniverse.com/forum/m_29...tm.htm#2976200

BR, Enrique