Professor of Gyrosopic principals needed ?

[uglymug]

Hi, what size of gyroscope do I require to keep a mass of 300kg at a constant vertical height of 1 meter?, the mass being 0.5 meters above the ground, Or would it be better to have a pair of gyroscopes 0.5 meters apart to attain same effect. The mass is supported at 2 points at front and rear but not at the sides, this is where the gyros come into effect to stop it falling sidewards................many thanks.