Hi Dave, by zig zagging I mean wandering. It won't go in a straight line just goes left then right slightly above 32mph. I did shave down the right leading edge a bit this aft and the boat now goes to the right if you take the hands off the wheel which is correct. It goes in a straight line perfectly all the way to full speed now. The only issue now is left turns feel very twitchy like the boat gets a little loose. Maybe some weight in the bow? Shane I absolutely would get a new centurion factory rudder for it if I could find one for under $1,000 landed here in Canada... they are an absolute fortune.