The next phase of this bring up seems the most obscure. - Need Futaba Rx for Phantom 1, CHECK - Set up 8fgs and calibrate Tx at at Tx and at Assistant, CHECK - Calibrate Compass, CHECK - Advanced Calibration of NAZA, FAIL ERR 27 I noticed in the LED Indication thread, pinned here, there is a need to WACK the NAZA to straighten out the accelerometers, in some cases. Odd. Shipping drop or hard crash. Are there any other clues about calibration? Yes!! The Compass Mod (not calibration, itself) is tied to it. De-gauss the compass? Hmmm..... In the Assistant, there is a very wordy mouse over, on the Calibration page, that says it. If the Mod value of the Compass, (last line on page) is not in range, you can't get there. You need a de-gauss....likely again, from the shipping. The Range is 750 - 2250. Woops. I have 369.7. Will report soonest. A lot of people can't get a Start, I read, but are not clued to this one.