As I understand, much of the difficulty controlling this comes from the gyroscopic effect. So wouldn't it be feasable to add a gearbox and a secondary rotary ma

As I understand, much of the difficulty controlling this comes from the gyroscopic effect. So wouldn't it be feasable to add a gearbox and a secondary rotary mass to cancel out the angular momentum? If you spin the secondary mass fast enough it also wouldn't add that much weight.