Video explains CoG effects.

[Janosch]

You can fly fast but you can't shoot straight. In this aspect, HSFX did a lot better job than the stock.

Ha ha ha, that's a novel idea. HSFX doing something better than stock in terms of flight modeling! That's rich! Hehehehohohoho. Ahem.

P-51, especially D, in stock is a frigging good plane. It can fly fast and shoot straight, just like your given 190 can do.