Earlier in the week I had the opportunity to fly in the back seat of Paul Ehlen's Mustang Little Horse. We were flying alongside Tim McPherson in Boomer. It's not a bad perch for air-to-air work, except for the glass between you and the subject, and the limitations of what angles you can get. There is no glass in the way when you shoot out of an open tail, nothing in the way at all, except for your own fears.