There are several reasons why gates are an issue at moomba. In previous years, most gates have been missed from the city end - with the short run in. However, this year the majority were missed from the bridge end. It was obvious that a lot of skiers took their gates from the bridge end with caution and was common for them to appear narrow and drift in before they went for it. If you are hesitant, the rollers, current and unusual run in will chew you up.
All the balls are on single string lines around 4 foot long down to the crosswire. Adding bungee and thickness to the buoy line has been found to increase debris catching on the lines, and drag more in the current. With very little elasticity, the buoys tend to move sideways, more than up and down. The guys who manage the course have been doing it for decades. They know what works, and what doesnt better than anyone! They have seen it all. Getting an RC slalom and jump course on the Yarra is darn HARD.
There are several skiers who pushed the limits on gates EVERY pass. All it takes is the smallest roller, the boat being a few inches off the centre and the buoy will move from where you expect it to be. If you want to ski at moomba and flirt with the right hand gate ball, be prepared to have them pulled.