Lindy's website with the float instructions is
http://www.flyinglindy.homestead.com/skisandfloats.html
As much as I am a documented nonadmirer of GB Floats, they'll probably work acceptably on an SE just because it is light and overpowered, and you could bolt it to the dock and it would still take off in 4 feet.
Do not misconstrue that last statement. A good set of foam floats would still be better.