Gary, to be honest, I dunno what the heck happened! Same as with many computer problems I've solved over the years, spend hours uploading/downloading, this and that, and when it finally comes back to life, I've done/tried so many things, I couldn't tell you which one in particular did the trick. Somehow I got the 3dr radios out of sync, so to speak, and the more I tried things, the worse it got, so I decided I'd try to go completely back to stock, Pixhawk, and the radio transmitter. I had hoped there would be a program I could just "upload" to the transmitter, but it has no card slot, like my Spektrums have, so I did the one step at a time thing. Took a couple hours. You have to pay very strict attention, and as you saw, it's about 4 or 5 pages long! I still have some adjusting to do, as my hover is now at about 3/4, in stabilize mode, and when I go to loiter, I have to pull it down to just below half throttle, to maintain level hover. But when you switch back to stabilize, you have to be quick on the throttle, as she'll drop pretty fast. I know I saw some settings in Mission planner, to adjust the throttle. I'm not messing with it today. 2 days of pulling my hair out is enough for now.