I converted the iFlight Nazgul Evoque V1 to work flawlessly with the DJI o3 Air Unit, but ONLY with camera uptilt angles from 0 to about 15 degrees. If you want more uptilt and don't plan on mounting an additional action camera, you can use something like this: https://www.etsy.com/listing/13762127...
If you mount the camera like I did in this video, the standoffs will be in view of the camera when set to "wide" with any uptilt greater than about 15 degrees.
Detailed Instructions below. All it took was a few VERY basic razor blade modifications, and a bit of soldering.
Read all the instructions before giving it a try, and remember... I'm not responsible if you mess something up:

1. Clip one side of the cables that come with the DJI o3 air unit near the plug and prepare them for soldering by exposing the wires, tinning, etc. If you're new to soldering, I found this very helpful:    • How TO Perfect Solder Joint  | FPV D...  
2. Find the wiring diagram Solder the wires to the correct pads on the flight controller at https://shop.iflightrc.com/BLITZMin... and click "wiring diagrams"

The o3 wires are colored differently from most diagrams shown on iFlight's page, so connect the colored wires to the following pads:

Red to BAT
Black to G
Gray to R3
White to T3
Yellow to R5
Brown (Orange?) to G

3. Trim the Nazgul's side panels to give lots of airflow to the o3 air unit, as seen at 00:57
4. Remove the old vista unit and camera. KEEP THE CAMERA SCREWS to use with the new DJI o3 Camera. They need to be shorter so they tighten properly.
5. Trim the TPU on the rear standoffs just a little bit so the o3 air unit will fit snugly and push the o3 air unit into place. See the video at 01:05
6. Remove the vista antenna from the TPU mount on the rear of the quad.
7. Install the o3 antenna like I have in the video at 01:28 or use hot glue, zipties, or whatever method you prefer to mount it. For a while I even ziptied it to the GPS mount and it worked fine.
8. Trim the very front of the side panels: you can see it in the video at about 00:50. This only needs to be done if you're going to fly with any uptilt on your camera, but again, will only work up to about 15 degrees before you start to get the standoffs in view in "wide" mode on the air unit's camera, maybe even less. In "ultra wide" they will be in view much sooner.

9. Update both your betaflight configurator on your PC and betaflight firmware on your Nazgul Evoque V1. You're going to want to watch a LOT of Joshua Bardwell in this playlist if you have any questions about betaflight or updating the firmware:    • Betaflight 4.3 Install, Flash, Setup ...  

10. To enable Canvas on the DJI goggles, go to the CLI tab in betaflight. Type or copy/paste the following into the text field:

set osd_displayport_device = MSP (press enter)

Then type:

set displayport_msp_serial = 2 (press enter, then press save)


11. Set the ports in betaflight ports tab like this:
USB VCP Configuration/MSP Checked. Serial Rx Unchecked
UART 1 = Nothing changes. Leave unchecked.
UART 2 = Nothing changes. Leave unchecked.
UART 3 = Configuration/MSP Checked. Serial RX Unchecked
If you have GPS, set UART 4 Sensor Input to GPS 57600. If no GPS, then leave UART 4 blank.
UART 5 = Configuration/MSP UNchecked, Serial RX CHECKED
UART 6 = Configuration/MSP Unchecked, Serial RX Unchecked, Sensor Input to ESC AUTO

12. Make sure your o3, goggles, and RC firmware are up to date.
13. Reinstall the top plate and straps to your quad.
14. Take it for a rip and ENJOY!

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