ram0506, I'd like to thank you for your advice, much better now, i added 30 springs, for each axis
I'm to lazy now, to open the joystick again, but so on I'll try with 2 x 10 springs, instead 30 springs, just testing
LE : when i try to calibrate, and press Apply, it says " NO NEW DATA "
Is that okay ? What does it mean, actually ?