you said to GLSNightPilot,
You are exactly right, the relationship to the CG is what counts. If the Tail rotor were much higher than the CG, the roll attitude in a hover is less. That is why a centerline tail rotor helo has about 4.5 to 5 degrees degrees left roll, while a high tail rotor helo (S-76) has about 3.5 degrees.
so the roll degrees reduces as the tail rotor moves towards the main rotor (this is what your saying) doesnt this reinforce what im saying? if the tail rotor is level the roll will be '0'.