Here you can some photos from my pesonal setup so that you guys know what goes where. Of course you might find better ways to build it but so far this is the setup I am very happy with. So I am using small lightweight whip antennas to make the quad weight less and using ziptie to manage the O3 unit cables, protecting them from the props. (I guess the images below will explain it much better. ) Hurricane 2 inch drone frame can be purchased at CNC drones website, https://www.cncdrones.com/hurricane-2-inch.html 5min flight sample (not stabilized) of Hurricane 2inch frame with dives and flips using 4s 750mah battery.
And here you can find the blackbox data of this flight.
PHOTOS click on images to see bigger