Build Description

Was looking for a 5" build that made the most of the RunCam Split. Something like the Chameleon is very attractive, but because it's intentionally designed for mounting a GoProSession, there's not much point in putting a Split in it.
I played around with a bunch of different mounting options, and there's really only room in this frame for 2x 30.5mm boards (plus the X4R and Tramp). The Split needs about 1A @ 5V, so that narrows down the FC to only a few options. The Betaflight F3 FC can supply up to 3A @ 5V and is a great FC, so that went in. ESCs went on the arms since there was no room left in the stack. Could have used any ESCs but I wanted to try out BLHeli 32 so the Lumeniers went on.

The X4R receiver tucks neatly behind the RunCam (yay, proper full-sized receiver) and the Tramp HV VTX sits on the stack top plate and wedges nicely between the aluminium arms. There wasn't enough room for any SMA antenna connector I had handy, so I put a u.FL linear antenna on the VTX. There's a nice antenna connector on the frame, so I might try to shoehorn a 90 degree SMA connector in there at some point so I can use a larger antenna.

I have the RunCam Split on UART1, the X4R on UART2 and the Tramp HV VTX on UART3. I gave up RX telemetry for control of the split, shouldn't be a problem for a short range rig with OSD. Apparently when Betaflight 3.2 lands I'll be able to control the Split through the OSD, for now it's just wired up and waiting.

To early to tell if I love the frame. It looks and feels heavy (solid?), but the setup is actually about 30g lighter than my Alien 5" and that's not counting the HD cam which adds another 74g to the Alien. I may transplant everything into another frame in the future, we'll see.
More thoughts to come after I fly it a bunch....

Update on camera FOV and short demo clips

Using the side plates designed for the cameras with 3 holes, the Split is sitting quite far back (as seen in the photos) and the aluminium part of the frame shows up in the video FOV Test 1.
I swapped out the side plates with the alternate set and the camera mounts forward nicely and you can't see the aluminium frame in the HD footage FOV Test 2. The potential downside that there's only one screw per side attached to the camera does not become an issue since the camera is wedged in tight and there's very little chance that your camera tilt angle will change.
I'm pretty happy with the HD footage coming out of the Split when the camera's mounted this way.

Update on Betaflight 3.2

I upgraded to Betaflight 3.2 to be able to control the Split from the Taranis. Initially I couldn't get the setting to "stick" in the configurator but I set the baud rate to 11520 instead of auto and it took. Switched back to auto after that and it works fine.
One thing to note about setting up the record start/stop on a switch is that you set the switch momentarily high to start recording and then momentarily high again to stop recording. For this reason, it's best to assign it to a switch that springs back to the low state when you release it (like the one at the back-right on the Taranis).