Why? So you can out-run all but 3 planes in the game (tempest, 262 and la7, 2 of which are perked), out-turn 90% of all the planes in the game, outroll all but spit16 and 190D, out-dive everything including P-47s, decelerate so fast your face would rip off and your eyes pop out, pop flaps at all speeds and gain endless lift with almost no drag, and easily shoot down any plane from any angle at ranges up to and including 1k, with enough ammo left over to land a 20-kill sortie without rearming?
Why? You want that, go fly an arcade game with powerups and maybe space aliens
F4us are overmodeled as-is. Enjoy it while you can. You never know when HTC might re-think the modeling and say "Now wait a second, this isn't right".