This Kaos I built from plans using the rudder pushrod on the plans and it had the wiggle and felt like the rudder was "soft" in k.e. and in the point rolls. Put in a straight carbon rod and what a difference! So much more rudder now in k.e. I had to add expo. Wiggle in the figure m and at the bottom of split s disappeared. I built a Kwik Fl from the Graupner kit and found the same solution to work.