Id strongly advise modifying the drones antennas too. Otherwise at distance you video signal will break up when you rotate, which is at best very annoying. Remove the two sideways facing patch antennas and fit two omni antenna to the legs, you won't have to worry about the drone orientation again, or losing video signal on RTH. Seriously i wish id done this right from the start. I use 2x6dbi and extended the landing gear, you could use shorter ones with less gain.
Where'd you buy antennas from?