Still insufficient information.
However, given that precession can be considered as rotating a force applied to a rotating mass by precisely 90 degrees, then simple geometry would indicate that to cancel out a force using only two rotating masses, the two would need to have parallel axes of rotation and opposite sign.
But you will need to explain much more clearly what you are trying to achieve, and if this would negate your patent application, then find a clever engineer to do the hard work, and get him to sign a contract assigning design rights.