Originally Posted by davkastheranger

Without actually trying this on a vehicle, I think the way to set the dual-rate is to go to settings and controls assign. I chose SW2 as it's right next to my thumb and easy to click on and off. Click on SW2 and Click on the first line and scroll down until you see Throttle D/R and EXP and select it.
I don't think the second two lines for Trigger/TURN and NOR/REV make a difference in their positions. Now back out of this screen to the main settings menu and select TH DR/EXP. Set your Rate F to 30% using the negative symbol. Now if you click the SW2 button, you should see it jump to 100%, and clicking it again brings it back down to 30%.
It's dark and raining here, so I can't test it myself. I hope this is correct and helps.