The airplane turned a sharp right on my first takeoff. I was able to yank in the air before I ran off the runway. It was a rough runway and I thought a wheel must have hit a hole in the runway.
The next take off on a smooth runway the same thing happened, but this time it was when I was correcting the airplane to try and stay on centerline.
So, I figured the steering was too sensitive. I reduced it.
Third flight, same thing, it vastly over corrected and went sideways. This is weird.
Looking at the airplane, which at this point had so little steering that it needed a football field to make a U-turn, I noticed how much rudder travel there was. I figured that the rudder was super effective, even at lower speeds and reduced the travel to about 20-degrees.
4th take off, I eased in to the throttle and the airplane held centerline and finally did a normal take off.
Lesson here: the rudder geometry allows for too much throw, Pilot made it like a 3D airplane.