So I have just installed an x8r receiver in my phantom 2 with H3-2D gimbal. The x8r uses s-bus. All channels work except the x1 channel to make the gimbal tilt. Everything also shows in the software but x1 gets no response except going to -1000 and staying there. I have the same setup on my phantom 1 and everything works ok. Any ideas? Did dji change the x1 channel from 8 in the stock transmitter after the firmware upgrade so that it won't work with a 3rd party tx?