Ok Guys - thoughts please
I simply unplugged the Naza (left it in the 550) and put a KK2 and a spare receiver from my 9x onto the top board. I then unplugged all the esc's from the naza and plugged them into the KK2.
Seems to fly just fine in my garden. Not an exhaustive test - but it seems fine.
So - the frame / esc's and motors must be ok?
Only thing is - this is not the same radio & receiver. I'm using the 9XR and frsky with the Naza and didn't want to unplug the reciever from the Naza.
I don't suppose there is any chance that the radio is at fault - or I have set something wrong in the 9XR????? Seems unlikely as it flies ok for a while before crashing itself....
Naza faulty - it's looking very likely?