Just like snow skiing, technique will get you further with less effort than muscle alone. I ski far better and more easilly into much shorter line lengths (32+ off@ 34mph) than I ever did 35 years ago when my technique was based entirely on "Just turn harder and hang on till it bucks you off!"
For those just starting to ski a slalom course, I'd suggest a speed 2-4 mph slower than you normally free ski. The full 75' length can actually be harder than 60' (15-off) except at really slow speeds. (24-28mph). To start with ignore the end gates and ski 6 rhythmical turns, inside the bouys if you have to, rather that thrashing to get around the next bouy with poor technique until you
: crash. Learn the course's rhythm and develope a solid body position so you can slice
thru (vs. bucking over the wakes) and soon the speed and angles you create directly behind the bost will cast you wide enough to round the bouys.
A useful perspective is to see the boat path as the centerline that seperates connecting arcs of the ski on it's same edge from wake-to-bouy-to-wake. Most people stay on their accelerating edge way too long after the wakes, generating too much speed too late and over-shoot the bouy
pull with no time/space for a pre-turn before the bouy. Put your panic
: in your cut behind the boat, not in your turn! Try to progressivley increase your edge angle and lean away from the rope/boat so that you exert max energy directly behind the boat (if you don't win here the boat does). Keep turning (re-directing) your ski from bouy thru wakes to create max angle coming off the second wake (aim for the shore). This is what will cast you wide for the next bouy
. Change edges quickly (without changing ski direction away from wakes) after clearing the foam off second wake while flexing ankles and moving inside hip and handle forward toward next bouy. This should engage more ski length and slow it down thru the long round pre-trun as you arc back around the bouy.
If you keep your free hand resting on your outside hip, you can patiently bring the hip/hand back up to the handle for a smooth transition into the next pull
(opposed to reaching for the handle early and breaking at the waist
). Until you get into shorter line lengths (32-0ff+) do not attempt to create a big turn angle right at the bouy, you will only get pulled out of it and wind up on a flat ski and getting a narrower angle behind the boat. A round turn that progressivly keeps turning into the first wake will be easier and far more effective.