Those are the Sig Rods... they're a bit "stiffer" and larger in OD than the Sullivan's... I'm building a Hog right now, and using the Sig rod for the elevator. Went 'pull-pull' on the rudder. This is my first attempt at pull-pull, and so far, it's sweet! Just make sure you Anchor the outer rod at both ends, and at least 2 points between the ends and you'll be fine. Use a 12" metal dubro 'kwik-link' in the end. Clean the rod off good with alcohol (no, not Jack Daniels!) first, then smear it with epoxy. Stuff it all the way into the white inner rod, and turn at least 1/4" of threads into the inner rod. You shouldn't have any problems with it. I actually like these a bit better than the gold-n-rods, but i'm curious about how the summer heat might effect the black outer tube, causing trim changes.