To disable chi for infinite bending, add the following to the bottom of GameUserSettings.ini:

Each bending ability has settings that can be configured. There are three possible configuration options:
- ProjectileLife - how long the projectile exists in seconds (related to the projectile range); default value is 0.5.
- DamageMultiplier - this value multiplied by the player's melee damage stat determines how much damage bending abilities will do; default value is 1.5.
- ChiCostMultiplier - a multiplier that determines how much of the default chi cost to use; default value is 1.0 (100% normal chi usage).
- SpeedMultiplier (only for AirJet, Catapult, FireJet, and WaterLaunch) - a multiplier that determines the power of a launch; default value is 1.0.

Set up your GameUserSettings.ini file like so:
Replace <AbilityName> with the ability you want to configure.
For example, to configure FirePunch and AirSpeed, you might do something like this:
Please note that not all abilities will use all three configurable options. For instance, in the above example, only the chi cost multiplier is being changed for AirSpeed because it is not a projectile and does no damage.

By default, when players use the new buff flag to remove their bending, they will be given a 10-minute cooldown before they can choose another element. To disable this, put the following in GameUserSettings.ini: