Don't get too anxious to "use more of your transmitter". If anything, more people should use LESS of their transmitter.

Dual rates is another bad idea unless you are flying 3-D. I have seenWAY TOO MANY people who crashed an airplane because they tried to do amaneuver and forgot that they had their low rates on, or they got introuble and didn't have enough control to get out of it.

If you want to use more of your Tx's potential, try adding some Expo.

With Expo, you get the advantage of low control when making small stick movements while you still have full control if you should need it.