She sounds like a keeper. ..

Those Servos should work great in that jet. JR metal horns will work fine, I never use plastic horns in a large model mainly because they can twist, that's when they tend to brake.

Swb arems are good as they have a pinch bolt on the servo spline end. Most of the metal horns from hangar 9 and some others you have to almost use a hammer to put them on

Just my 2 cents

Good luck. .