Another comment on the Aussie built boats..
The early TXIs did not track great and there was a great variance from boat to boat in how the track and sit in the course. Many of them seem to sit nose high and tend to float, even with some weight in the front. I have driven 5 or 6 2013 and 14 TXIs and there seems to have been a continuing improvement since the first year of them. Maybe it was just those boats, but the promos I drove of that year, it was near impossible to keep rhythm and feel with the skier. Every American made response I have driven has tracked much better than any Aussie built boat. What they do differently to our boats, I do not know. But I have no doubt that it is a lot more than the little rudder tab!
Despite all that, I think the build and material quality is much better in our boats.