I have setup a pull-pull rudder on a 37% Ultimate, and I have a question. Cables are tight on both sides when centered-- however when I start to deflect the rudder, the cable on the opposite side gets slack -- when fully deflected, the slack is very pronounced. My question: is this normal?

here are the details:

SWB self adjusting tray with offset bellcrank
Distance across the bellcrank is 2.5"
Control horn on rudder is 4" from end to end (using du bro HD 10-32)
The control horn pivots on the hinge line
Using cross over cables
Lenght of cables is approx. 30"

I want to know if I have done something wrong in my setup, or slack is normal in this configuration? This is the first time I have tried an offset bellcrank and cross voer cables.

thanks
Jim