I absolutely love these. I printed them out an had them spiral bound so I can teach off of them more effectively. The ONE thing I would recomend to the developers is anywhere that is aircraft specific (ie diamond aircraft) make some kind of marking so we can adapt them to the aircraft we use. My school house uses pipers and I spent alot of time adjusting to meet my aircraft. I would never expect them to make it perfect to every aircraft, however, a simple marking could save me alot of time in searching.