Curious why you want thick t-bars for a drag car? I know you have a pretty good setup, so actually want to know your line of thinking or maybe what new info there is out there that I haven’t seen (not trying to start an argument or pretend I know more).
Also, have you looked into delrin bushings (maybe you already are)? Again, with the drag car thing. Bergman has a setup with pins and such.
I have the QA1 rods, waiting to get the car back from body shop, so no experience other than they look nice.