I did this build to be able to do some 4k videos around my place. Had to spend a lot of time to remove all the noise on the fpv video feed (was due to the telemetry of the R-XSR). Still have some noise when arming but it is flyable, I need to investigate more.
This drone is quite heavy for his size, and especially with those 2inch props (3inch doesn't fit) but is still fly smoothly.
Do not hesitate to post a comment if you have any questions or some tips on my noise issue when arming.
Photos
Same here, after a complete rebuild and capacitor replacement, I was able to remove some of the noise when armed, but still have some diagonal banding that varies based on motor RPM. The instructions advise to connect AGND on the Caddx which did help somewhat; hard to tell if GEPRC had it properly connected, but everything was so tight on the bind-and-fly model, that I likely trashed a bunch of connections.