I like to check my Phantom with the NAZA Assistant every week or two. Everything usually checks out as OK. But, if I run an advanced calibration, just to be safe, I will get an Error 26 warning. I then do the advanced calibration and the error message disappears. Because the Phantom seems to fly OK, I'm not sure if this Error 26 is a false alarm or if, in fact, something is a bit haywire? I've had a couple of hard crashes several weeks ago but have flown many times since then without incident (one exception was today, but that's another story). Do I need to give my NAZA a therapeutic knock?