The pic is of my MX400Pro w/ Trex mods. The gyro works noticeably better here than in the "standard" location.
Test it yourself with your gyro!
And I am referring to the Gyro manufacturer's instructions, not the Align Heli instructions.
Another prime place for mounting is directly under the main shaft on the floor, if you can get far enough from the motor here.
The gyro works by sensing yaw. The further from the yaw axis you are, the more the heli has to yaw before the gyro senses it.
Not trying to stir up a controversy, just trying to get people thinking.
Try the alternate locations. I have...