Thrustmaster AVA Manual Del Usuario página 28

Adjusting the resistance
Three types of springs are included with the AVA base.
These springs allow you to adjust the flight stick grip's
resistance.
Spring
(by default)
To customize your AVA base to the maximum extent
possible, you can use a different
springs per axis, and even a different spring per axis.
Resistance
Medium
fine-tuning of the
27
Strong
Weak