I don't know whether you're referring to me or Bandelero33, but as I stated I put in a new Futaba servo(HT), and the trim were original done on a block with wheels off ground. Checked for any binding and anything that looks off. Took the entire front end apart and reassembled. The only thing that doesn't work properly is the thumb screw on the servo saver which is kinda frozen, but seems to be at the proper tension when tested by hand. Yes, the servo is centered with radio and receiver on. Yes, I've tried steering trim adjustment while it is driven. The thing tracks straight, but doesn't fully straighten out after steering is used. This all just occured like 2 weeks ago.
I'm just gonna replace the servo saver and see what happens.