Just completed this with a twist, and I love it! I went with 'head locked to target' and 'zoom' buttons added to the front left, but used toggle on, toggle off buttons so I can click it on and free up my hand. Works great! I can now do what I'd do in real life, where you keep eyes on the target and bring the plane to your eyes. I could never use that before as the button was horribly placed and unreachable. Makes such a big difference, I really REALLY am enjoying the game now
The fact he zooms in a little when you use it was icing on the cake!