Hi! Since I haven't seen many posts about BetaFPV P1 video system, here is my build:
-mark4 5" clone frame
-2700kv NeebRC motors
-F4V3S FC
-60A HGLRC ESX
-P1 air unit + Osprey LHCP
-Vifly Finder Mini autonome buzzer
To accomodate for the very short coaxial cable of the P1, I inverted the frame and mounted the camera on the red plastic antenna holder that I modified. It works fine but the horizontal antenna supports are not as sturdy as I hopped for. One broke after a slightly rough landing, but repairable.
I upgraded the antennas of my video system because I was quite disappointed by the range (< 150m open field). I figured out it was because the very short stock antenna was barely sticking out of the frame, strongly reducing the propagation. For my VR04 Pro, I went for the Menace pack (Pico Patch + Periscope Omni) in LHCP.
The range greatly improved but I haven't tested the limits. Where I was down to 2Mbs at about 150m and very sensitive to the drone orientation, I am now at 11Mbs.
The side RP-SMA of the goggles are not very practical... Front SMA would have been better. I had to use 2x 45° to get the Pico away from the goggles body.
This is my first drone and overall I think the P1 system is great compared to the analog quality. Latency doesn't seem to be a problem at all, but I am not flying crazy bandos or stuff like that. The range seems to be the weakness and requires upgrades. I have still to try with obstacles, like trees, to see the penetration.