Hi All Finally took delivery of the new P4 (delayed because of attempted freight rip off by Helipal - but that's another story). Spent a fair bit of time with the software which anyone would have to agree is pretty comprehensive. One surprise with the software, which was verified in actual flight, is the 500M limit imposed on both altitude and radius of flight. Sure enough when I took the bird across country it (figuratively) hit a wall at 500M and no further could I go! I got a brief message on the screen which I think mentioned something about adjusting the limits somewhere. So is there a work around to extend these limits! 500M is restrictive for some of the projects planned. Would the same limits apply if using the (Litchie?) software that I've seen mentioned in these pages? All comments/advice appreciated as always!