oh sorry, yeah i said that in my first post in this thread but the replies are pretty far apart so i can see how you missed it. here's a pic of the first mockup gate that i made last summer, just to make sure it worked. the angle is way more than the angle that ended up working best--i found that 21-22 degrees is ideal for both the wave and handling of the boat.
IMG_3646.jpg

it would be pretty simple to re-create this if you have the same platform, if you just want to see if it works. a couple pieces of wood and offset brackets to sandwich the rail on the platform, which holds it in place. a couple turnbuckles to secure the assembly, hinge, and 15x20" wal-mart cutting board with the hull angle cut out so that the cutting board is flush, and you've got a template. i can send more pics in the next few days if you want.