Smooth rudder control with Yoke

[noek]

I'm trying to control the aircraft rudder with the Saitek Pro Yoke, instead of buying rudder pedals.
I want to use the C1 and C2 buttons for left and right rudder steering, and when I release the button I want the rudder to (if possible, smoothly) restore to the center position.

Configured the C1 and C2 button as follows:

C1:
Pressed (Mode 1): Send RUDDER_TRIM_LEFT-event (Buttonmode: triggered every 25ms until released)
Released (Mode 1): Send Rudder_CENTER-Event

C2:
Pressed (Mode 1): Send RUDDER_TRIM_RIGHT-event (Buttonmode: triggered every 25ms until released)
Released (Mode 1): Send Rudder_CENTER-Event

It doesn't work as I want, though. The 25ms repeat mode doesn't seem to work, as the rudder only goes one step left and I need to "click" to move it even more. I've also tried the RUDDER_LEFT and RUDDER_RIGHT instead of the TRIM variant, but same result.
Furthermore, the rudder doesn't restore to the center when I release the button.

I hope I'm in the right direction and was hoping to get some pointers here. Thanks in advance for the tips!