Kosmosima ... Z-axis vs. RotZ-axis

[Hyde]

Just a quick question to help me as I work through learning VKBDevCfg:

To my knowledge, the twist axis is the RotZ axis.

VKBDevCfg's default configuration includes config on the Z-axis. What is this used for if the stick doesn't have a Z-axis?

I'd thought it would be disabled on the Kosmo-Premium like the Slider and Dial axes.