The ones i have mentioned are slower than some 5 ply blades like stratus power wood. It is really the extra stiffness that people want with 7 ply blades wherein some would not like their blades to be too flexy.
Would still depend on what type of booster is used. If the stronger ones probably 4 layers
QUOTE=729B2;284755]i really wonder what a 42 degree h3 would be like and how many layers it will need to boost it to make it work