Easy as Pie.

Think for a second about whats happening.

Put the camera and the gun together. Aim at a garage door or wall where you can easily see the impact from the airsoft projectile. Set it to the range you want it to be accurate at.

Look through the camera at the monito you're going to use. Fire. Don't even think about where the projectile hits. Just put a tape dot on the screen where you saw it hit. You can move the camera around to center it up if you want to.

Repeat the process. Once you get it set where you want, (close to center sounds great) Just put a tiny mark on your monitor where the impact is viewed.

Now all you have to do is fly your plane till you get that dot on your intended target.

Dan