using a pitch axis gyro might work, but im sure would cause a lot of problems with flare and brakes etc...

about using a yaw gyro to release brakes if a yaw deflection is caused is not a good idea, since gyros correct servos BOTH ways - i.e. one right deflection would release brakes but left deflection would apply brakes. that is unless you use 2 brake valves which is a mess.

im no "expert" but i'd love to know what the author meant too.