"Great, I suspected as much. Will save trim and reset on tx and retry. Much thanks."

"Hey guys I can't get AutoTune to work with these SimonK ESC at all. Testing without batteries plugged to computer via USB confirms AutoTune mode engages. The copter does not start twitching or calibrating itself when testing with batteries. 
I have…"

"UPDATE: The autotune is still not working at 50% throttle. When testing attached via USB with the battery unplugged, MP says that it is in AutoTune mode. I re-calibrated the compass, and it now gives warnings but not FAIL. So I think the compass…"

"Oh I think it's because I wasn't putting the throttle at 50% during testing.

I will try this and repeat at a later date."

"Here's a flight test from today. I am trying with this foam that I had (before considering purchase of the expensive foam Bill mentioned). It looks like there are still a lot of vibrations, and some of them go very low but I think that might be due…"

"Would having the FCB on top of the frame rather than nested inside have any effect on vibrations? I'm wondering if the wind from the props might be doing something to it (aside from not having proper foam of course)."

"Any suggestions what sort of tests I should run? 

Thanks :)"

"Hey Stephen!

Thanks for the detailed report, that is incredibly helpful. I do have some questions that hopefully you might be able to answer.

When the RC radio link first went down, it looks like the altitude was still quite low (not sure of the…"

"It was 0% at the start because as I said I panicked, but then I moved it up to 50% right away, and it still died.

Any clue what the battery failure could be about? I checked the battery afterwords and it was still full."

"Thanks for the explanation Bill. I was using bubble wrap as a dampener under the Pixhawk, but maybe that's not enough. I'm gonna try using some insulating foam used in doorways instead once my new arms come in.

I read here…"