First build. I was going for 30% performance, 70% budget.

AUW: 603g

Frame

Not sure if I built the Martian frame correctly as I mounted the arms on top of the bottom plate instead of underneath. It seems quite robust. I've already had a few crashes and it has stood up to the abuse beautifully.

Flight Controller

The Omnibus F4 V3 challenged my soldering skills due to the small through-hole pads. It seems to fly really well only Betaflight 3.1.7. Only minor changes made to the stock PIDs. I updated the firmware to 3.2.5 but haven't yet flown it. I will try the stock PIDs first and see if any changes need to be made.

Motors

All of the motors have a little play in the bells. When cruising at about 30% throttle I see some oscillations in my goggles. I haven't determined if the loose motor bells are the problem. Paired with the Kingkong 5045 props there is a decent amount of thrust and speed. But as this is my first build I probably don't know what I'm missing.

ESCs

No complaints. DSHOT600 is smooth.

FPV Camera

The Foxeer HS1177 V2 is many steps above the 1000TVL board-mounted CMOS I had on my only other quad (Kingkong 260). Video is clear in a variety of lighting conditions. The 2.5mm lens is a nice compromise between less distortion and having a wide FOV. I recently soldered the camera control wires to Motor 6 on the Omnibus F4 with a 220ohm resistor between them. This allows for camera control through my transmitter instead of using the supplied control board. Much easier for parameter changes as lighting conditions change throughout a flying session.

I mounted the camera on a 3D printed mount made for the Martian 220, but the piece that connected the 2 vertical supports was too wide and it wouldn't fit over the standoffs. So I cut the middle part out and made 2 pieces which allow the camera to mount perfectly.

VTX

The DYS MI200MW was giving me trouble initially. It would work well for 5 minutes, then video would start to cut out. And within 5 minutes all video was lost. I resoldered the connections and the problem disappeard. This VTX is known for getting very hot. Apparently the 200mW setting is actually higher and the 25mW is actually lower. I've ran about 30 packs through this quad and the VTX has performed very well on 200mW each time. Very little breakup on 200mW with my Eachine VR D2 Pro googles with the stock antennas (the longer, red ones).

The microphone on this VTX is a disappointment. The sounds is very distorted. Though, the problem may be due to the fact that my VR D2 goggles didn't have an audio wire connected to the DVR (known problem) so I added a wire myself.

Conclusion

I am happy with the way this quad turned out. It flies well and is great for ironing out all my beginner flying mistakes. If I built it again I would probably use a different VTX (probably Eachine TX526).