Brian, this is probably stating the obvious, but I'm doing it since you said your Impact was flight ready.
In the center photo above of your rudder servo, it appears to show the rudder horn screw is missing. Maybe it's just the angle of the shot.

Just thought I'd mention it, in case you hadn't noticed it already. If I'm mistaken, please disregard my butt-in. Better safe than sorry, I always say.


Good luck with the test flights.

Rick