Great minds think alike!
One of the throttle switches on the Warthog HOTAS is spring loaded. I was able to program it to do three things when held down with my thumb:
1) Zoom in (30 POV)
2) Center (this is a TrackIR command)
3) Pause TrackIR (TrackIR command also)
As I approach my target I press this switch immediately before firing. This gives me a locked in, stable close up view of my target. When I've finished firing I simply release the switch and the switch returns to its default position - which I programmed to automatically reverse this zoomed in firing view:
1) Unpause TrackIR
2) Zoom out to 70 POV
3) Center TrackIR. (I find my head moves unintentionally when firing -- which you don't realize when the TrackIR is paused when shooting. I found it a little disorienting to have your field of view jerk off center when unpausing TrackIR)
Let's face it, it's a little distracting to be weaving your head a bit "chasing" the reflector sight while trying to line up your target. After shooting, it's so much easier to just release a spring loaded switch than having to remember which joystick buttons (or worse: keyboard keys) to tap to regain SA while dodging return fire and maneuvring for another pass!