I had to be a little coy until I got the go-ahead to talk details about this from Jennifer Leachman-Lapoint. I've been working closely with her and we are racing to get the beta to market this summer with the best fidelity possible. As anyone involved with software knows, this will be a buggy, iterative process - but we NEED participation and data from all kinds of different places and conditions to make the product more accurate and most importantly, more FUN.
A critical goal of this project is to turn any lake into a slalom course. Long-term success is to see more people swerving and participating in slalom outside of the private lake scene. Help us raise the visibility of slalom - even without buoys it just looks cool and will inspire others to come out and play.
And for us BALLERS, there will be a league for slalom with real buoys too. So, we also aspire to make this a useful virtual leaderboard to log your scores with video proof and GPS verification, especially for those who can't make it to tournaments.
To confirm previous comments, no camera mount is required, but mounting it is just fine. While the accuracy is probably better with a pylon mount (depending on the steadiness of your cameraperson), one of our design mandates was to require nothing new from the player - no hardware to buy, no pouch to hold your phone, etc. Many approaches were considered and thrown away because they created too much friction and discouraged participation.
Thank you @pregom @Wish @klindy @Alberto Soares @UWSkier and especially USA Waterski for contributing and noticing the product. We sincerely appreciate any and all efforts to spread the word.