steering issues
I personally have not experienced the binding that everyone else has experienced. I have approx one gallon thru my car with out any failures except for a broken ball up, and a rear tower.
I have seen people break servos, but never to the point of tight spots in the rack. I race with trinity drivers Joel Johnson, and Mike Dumas, on many occasions. Their cars are rockets, and pretty much trouble free also.
I have seen aftermarket stuff from GPM, many aluminum parts, including a aluminum servo saver, with nylon inserts. Maybe this might be the mysterious fix all, who knows.
I would just make sure the assembly is correct, before you go ahead and condemn any part(s).
These are just some of my personal experiences.