I realize that the P-51 CoG was moved but,

[MaxGunz]

I thought the D's were the longer range model and there might be a way to get a P-51 closer to combat condition in game. Is it just the bubble top that's different?

Zeno's has loaded some videos up on Youtube including an intro to the P-51 on handling and characteristics. It is supposed to keep alt without trim change for some range of speed changes which is a wing and tail balancing act. And before that tidbit came up there was mention of the Merlin making the plane a bit nose-heavy compared to the original Mustang. So just -maybe- a version with empty fuse tank will be less trim intensive.