Wow, are those guys really sailing boats or writing some type of thesis for a post-graduate degree in sailing theory.

Here's an easier way. Get the prebend number from the tuning guide, manufacturer, or an "expert" sailor for your type boat. Which would include spreader rake, diamond wire tension, and total mast bend so you can check it. Then all you have to know is rotate for power; derotate to depower.

If you find you still cannot keep your boat down when the wind is up, you may want to crank in more diamond tension on those days or for those races. You can mark your mast for your high and low setting.

BTW, get the proper mast rake while your at it.