Finally got back to the build. A lot of time was consumed updating the OpenTX system on my Taranis X9D+ and getting the new Lua scripts functional to control the Crossfire module. There are many new things to learn about the CRSF protocol and all of the new settings.
The Crossfire can use a PPM, IBUS, SBUS or the CRSF protocol but I figured since I'm going through all of this hassle anyway I may as well try CRSF. Supposedly, it dramatically decreases latency. I'm probably not a good enough pilot yet to get much benefit from it but for very good pilots it's said to make a big difference.
I got the BFF4 updated to BetaFlight 3.2.1 and my Aikon ESC's to BLHeli 16.67. Tested motor function, changed to DShot 600, got the Crossfire bound/communicating and set-up basic settings and my radio in BetaFlight.
A change on the BFF4 from the BFF3 that has me a bit concerned is they are now suggesting running the VTX direct wired to the Lipo. On the BFF3's my Tramps run off the VBAT on the FC. This is my first build with the VTX wired directly to the Lipo. Hopefully, I won't have any issues with it. I do have a low ESR cap connected to the Lipo as well so hopefully that will keep things in check.
Although the Crossfire receiver is relatively small, it's an odd shape. I was having a lot of difficulty placing it. I finally decided to raise my FC standoffs and slide under the FC. I'm going to install the antenna on top of the canopy as I want to keep it as far away from the carbon fiber as possible. I still have to figure out how I'm going to mount it. This is when I wish I had a 3d printer!
With a lot of luck I'll have it ready for a test flight or two today or tomorrow, weather always being a factor.
Jerry