Hello, thanks for your post. I've also tried to replicate Baur gimbal design- but no luck. Does your gilbal centers without any issues ?
The problem with mine is that there is no clear center. I can feel centering spring only near the max position of the rudder.
Here is my rudder centering cam and off center issue:

http://SimHQ.com/forum/tmp/11474.png
http://SimHQ.com/forum/tmp/11475.png

and my cam dimensions :

http://SimHQ.com/forum/tmp/11476.png
http://SimHQ.com/forum/tmp/11477.png
http://SimHQ.com/forum/tmp/11478.png

I'd greatly appreciate any help, after 2 years of using it it would be nice to finish the device with clear and strong center position.
Best regards, Czarek.