www.seabreeze.com.au/forums/Windsurfing/Foiling/Fanatic-Falcon--2010--usage-with-a-foilnot quite the same kind of box talked about, but its the same story as in the thread above. If it was me, i wouldn't trust a power box for foiling. It's only a matter of time before things go wrong.
the adapter with a flange plate will help a little, but not enough. If you decide to foil with a power box, i'd keep a close eye on the box area after each session for signs of failure. And pray it doesn't fail suddenly.