Thanks for the response, Heliko. By your checklist everything seems okay (full-right rudder seems fine and motor sounds okay as far as I can tell). I'll trim it more to the right and hopefully that reduces it.
Three adjustment pots for the tail is ridiculous.
Not sure what you mean by this. Are you referring to the three adjustment screws on the 3-in-1? This is my first so I don't know what's standard and what's not. What's on a T-Rex, for example?