Page 9 of this forum - By Glenn Quarles. And maybe, I don't understand why you would want to "Do the shingle" thing on some sponsons if it's for the New Hydro your building? I can't speak for Glenn, but I can only guess as to why he has the shingles on his twin - is due to weight on the front end, and he wanted to make sure that he had a good progression on the front sponsons to get the thing out of the water. After that, he's riding on the last shingle when he's up on plane. The idea I got from this - was adding a "riding plate" on my sponson's due to the error I made when designing them - too narrow by 3/16". Also, if your A.O.A. on the sponson's are correct (Between 3.4 - 3.6 degrees) - you shouldn't have to worry about Shingles. If you notice the design of the JAE sponson for example, the plate in the front(Bottom) of the sponson - is just there to break the shear of the water when you first throw it in. Then, it's ridng on the back plate(bottom) after it gets on plane.