A friend and I are trying to connect a brushless gimbal to the Navio2, but we are having a hard time trying to figure out what ESC should we buy for our brushless motors. We are not using any control board dedicated to the gimbal, because the Navio2 and the Ardupilot can do that perfectly well (we already tested a servo gimbal and it worked perfectly).
The problem with an integrated (at gimbal level) stabilization circuit is that we are loosing some functions vs. a gimbal directly controled by the Navio. For example, controlling the camera orientation with the GCS, and point continuosly to a defined object at ground, move the camera at certain points of my planned route, etc. So, cost and functionalities can be better for a Navio controlled gimbal.