Thanks Stick Jammer for the pull-pull info. The spring balanced what was screwed by different arm sizes. I scrapped it. I found also, that kevlar was thorned up in the place when it was going into the tube and where it is going out of the fuselage. I scrapped it too.
I have build entire new pull-pull linkage. Of course my favorite carbon fiber.
Because I couldn't guide the line straight (I would need to cut long slots in fuselage) so I used combination of carbon fiber and kevlar. From the servo all the way to the tail out of the fuselage I have long CF rod and from there there is a kevlar thread (to provide a flexibility).
Servo horn is the same size as rudder horn so I got clean linkage without binding and no slack at all. I was testing my connectors and they are plenty strong.

I'm proud of my pul-pull

Here is the picture of the brand new pull-pull

RysiuM