So I got a little frustrated and took a break from the project I'm working on aaaaaand did this to Gigantus.
It's called the Model D and has increased engine power, larger elevators and ailerons.
Not to mention far too many weapons for it's own good.
Just for laughs, get two of these and let the PC dogfight them.
It's like watching monsters dancing, scary but somehow elegant as well.

Edit: I may have created a monster.
Got an F-15C handy?
Get the PC to fly vs one of those or maybe a Flanker, as long as it doesn't have those darn 'russian missiles' or whatever they are, those things are just not fair, how can they turn what seems like a 90 degree corner to make the kill?

If I saw one of these coming for me, I'd run away.
The only thing it lacks is counter measures, can't carry enough of them :F