Trying something new with this one! It's my first true freestyle quad with a top mounted battery and dedicated place for a gopro. As such, it was kinda challenging to build since I'm not used to that kind of layout. I had to think about what to do with the battery pigtail, where to mount the vTX, etc etc.

I really wanted to try the Fortini F4 OSD as a flight controller because I think it's great that it supports 32kHz gyro (for BF 3.3) and it has a dedicated pin for camera control, amongst other cool features. But now I kinda regret this decision because I didn't anticipate that it had only 1 fully normal uart (uart1 has both TX and RX pins without inverter or anything). The other uarts either only provide a TX or RX pin, or have an inverter in the way. For a normal receiver this would not be such a problem, but in this case with the crossfire, I could not add the GPS module I had planned...
Another point of concern is that I had some nasty yaw twitching on the first hover test (the only flight so far). It seems strange because I have softmounting (built into the FC) and a capacitor on the mains, which are the two usual remedies to yaw twitching. Maybe a faulty gyro? I tried softmounting the motors too, we'll see if that helps.

I initially wanted to use the normal crossfire antenna (the flexible one) in an L shape to have some kind of polarization diversity, but it was a sketchy mount at the back with zip ties and heat shrink, and it would have been close to the video antenna, which could alter the tuning of both antennas. So I went for the immortal T which is super easy to mount on the back arm.

Quite happy with the "Race wire" as a solution to the annoying problem of having to swap a motor or an arm with a 4-in-1 ESC. Also it helps with propstrikes, although I never really had a motor wire cut by the props.

Not pictured here is the final solution I adopted to mount the crossfire RX and vTX. I put the RX right between the back arms and the back standoffs, on the bottom plate (the width is just perfect). The vTX is kinda held on top of that and the back arms with a zip tie that goes around the bottom plate.

UPDATE! I upgraded the flight controller and put a HelioRC Spring in there! I only did a couple of tests but I can tell this thing is amazing! The motors sound totally different that with other flight controllers, much smoother.