I had some luck in G-10's of course... but it is challenging bird due to the reasons mentioned earlier. I'm just not comfortable in it.
It is flown poorly so often, I shot down scores of them in my humble FM2.
It might be a good idea to fly it more with the difficult cannon and try Pepe's tactics but it seems to me that those will make you vulnerable to slashing attacks.
I mastered to some extent the FM2, P-51B, F4U-1 and La-5, each with an unique set of characteristics, good and bad. Maybe time to try the 109. I rather like the G-2 sometimes but why not take a challenge and start with the G-6? Hmmmmm...