After breaking many cameras on my 3" builds I finally decided to go for something a bit more durable so the Japalura seemed like a good choice with the hybrid aluminum and carbon fiber cage.
In order to deal with vibration to the FC I had to use 2 m3 rubber o-rings above and below the frame on each of the 4 posts, and another single set between the FC and the RunCam Split. After that I was able to get it tuned butter smooth with dRonin's Autotune feature.
I didn't realize the HGLRC board supported dRonin, I'd like to try it. What target did you use?
Most HGLRC boards I have tested work with the "revolution" target. Buzzer is normally inverted but solid otherwise in my experience. I just inverted the buzzer in code.