109F is one of the finest duelists in the show.
It's a tad worse since the tag was put on it, - many opponents now know like "Ah, it's an F, it won't run" if you see what I mean.
But it turns very well, and is generally nimble, a very enjoyable aircraft. Excellent aircraft for knifefighting US fighters for instance.
The nastiest foe is the Spit V IMHO....