Todd,

There are different ways to get to Rome I think. Your solution certainly has its advantages, but takes quite some modefying. Weak point in every link stays the lengt of the steel rod used at the ends. Specially when you have to bend it a little, there is always some play. In this plane , one can use a perfect Y with carbon rods. The are no other angles needed. Thats why in this case the Y connection with carbon can be used without play at all. I now only have some play on the rudder, because the steel rod part connected to the servo is too long, or the carbon rod too short for that matter. I'ts clear when you see the attached picture. The advantage of the carbon Y-rod connection, is that apart from the rod itself, there is no modification needed. That can be usefull for the lesser experienced builders among us.
It's clear however that the provided system with the nylon rod, and the Y-part of 8 inch lengt of steel rod certainly has way too much play.