Do make sure which radio you're using, before setting exponential.
For JRs, the above info is correct. For Futaba, you want - 25-30% expo.
(Not fun to find out you've got it the wrong way... trust me.)
Not sure about other makes of radios... but you want whichever way makes
the cyclic have less movement around center stick, and more at extreme stick positions.

Not a heli expert at all... just wanted to make sure you got the expo right, if you use it