With respect to gginco's comment, I have had the opposite experience in that the ski is more forgiving of mistakes at the ball, not less, than other skis I have ridden. I do find that I tend to get narrow on the ski and have to concentrate on holding maximum angle and speed from the buoy to the wake so as not to be narrow at the next buoy. The funny thing is that while I feel narrow coming into the buoy, the ski seems to keep going out more than other skis, so I don't hit the buoy even when I feel like I might. This ski is either drifting out or it is coming in; it doesn't seem to want to stay parallel with the boat if I am early and waiting. This is why the 35s are not as smooth as I would like (I generally ski 35 very early) but why 38s are better (for me) on this ski, as I am not good enough to be "too early" at 38.
With respect to Mike T's ski set up, I would say the proposed moves would be the correct ones for the perceived problem. Are you sure that the fin is at factory settings? The reason I ask is that Goode measures fin length differently. The engineer in me hates this, as 6.768 inches should be 6.768 inches if measured by a scientific laser accurate to the millionth. Instead, Goode measures the length with the body of the caliper tight to the fin rather than using the tips of the caliper, which should be the actual length. Not having messed with Goode fins for 10 years, I had forgotten this and was wondering how the factory could have sent me a ski set up so far from the factory settings. Dirt straightened me out and reminded me of what I had forgotten about 6.768 inches not really being 6.768 inches.
Before moving the fin, I would also take the wing from 9 degrees to 10 degrees and take a few passes and see what difference you feel. Conventional wisdom would say that more wing angle would cause even more hesitation at the finish of the turn, but I actually felt the opposite.