[DanLevin247]

With the platform below the wheels....when you start moving, the front of your'e platform will dip down upon acceleration...correct? If you correct this initial lean by compensating in the opposite direction wouldn't, a pendlious action occur...rocking back and forth as the rider tries to maintain ther own balance? This act of acceleration would cause you to lean even further foward before you had a chance to compensate...and if you had true segway like function...go even faster?
If you had your'e platform on top of the wheels, I think it would be harder on the gyro, but easier to maintain balance upon acceleration.