I can’t seem to get my differential thrust to work, any ideas why, I have the button mapped and pushedYou can use channels on the R88 that aren't being used for the Aura. Be careful with your choice that you don't use one that is being used by a feature on the Aura5. I don't think channels 7 or 8 are used by default. You will need to map it in the inputs and Mixes on the radio.
5 is your flight mode
6 is the Differential thrust enable/disable