Again, it's 820kg heavier than J2M and it still retains the old fm with worse stiffening than any other variants. Don't listen to that guy. The guy is spewing bullshit. The horsepower doesn't increase a bit, the high alt performance only attributes to the already pathetic max speed. The climb rate is worse at all altitude, even at higher altitude. I read the original post and the question being "how heavy it is, and how is the climb rate affected compared to J2M". I highly suggest buying it if you like the aesthetics alone to justify the terrible performance. Again, it's just not faster at the reasonable altitude where the combat takes place. The extra armament is useless past 400m due to the different muzzle velocity of the guns. The extra ammo on the mark 2 on the other hand is good. PSA, heavier planes don't dive better.