Here is something that the manual says about the G90 Gyro. "the transmitter included with the Blade CP+ does not offer proportional control of the fifth channel, it will not be possible for you to use the remote gain control option of the G90 for setting the gyro mode and gain from the transmitter." So unless im mistakeing, that means you have to set the gyro by hand kind of like you would adjust the gain trim and built in gyro of the 3in1 unit. So you can still use the G90 gyro you just cant adjust it from the transmitter on the fly.