I've had the P4 for under a week and I am utterly impressed especially being my old unit was a P1 back in 13'. Night and day difference, really is a brilliant piece of technology. I have gone through everything and used all the relative features which all work seamlessly with the exception of tap to fly which leads me to believe I am doing something wrong. When the P4 is in front of me and I enter the tap to fly screen its my understanding that if you tap and go anywhere above the horizon line it'll keep going that way (as there is no end point) but if you mark a point below the horizon line it'll stop at the relative point. Is this correct as I have been unable to get it to stop. In any given situation where I have used it and selected a point above or below the black horizon line it will go in that direction and keep going at which point I always take control ? Can anyone shed some light on this for me & thanks for any responses in advance ? Mark.