Light Helicopters and Tail Rotor Rolling Couple

[India Four Two]

I posted this question on the Questions forum:

On an AH&N thread,Tiger mate described the tail rotor rolling couple:

Any Borneo Whirlwind veterans here?

This is something I hadn't heard of before and did some research on the subject, including looking at a three-view of the only helicopter I have flown - a Bell 47.

Some of the information I saw indicated that the ideal tail rotor position for avoiding a rolling couple, is level with the rotor head. However, all of the light helicopters that I looked at, including the Bell 47, have the tail rotor significantly below the rotor head.

How is the rolling couple handled in these light helicopters?

I42

and I received one reply:

Trim!
And if you use the Rotorheads - PPRuNe Forums section you'll probably get some links to illustrative graphics.

Links or explanations anyone?