I wouldn't suggest these to anyone. They are too flexible hard to perform sharp maneuvers and worst of all, if they flex down they will shatter the blades and the tail. It happened to me and the tail is irrepairable. They are too good to be true.
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We've sold thoudsands of the AX-07 out and never have report that the blades hit on the Tail on another Rotor, we tried these blades on the Walkera 53 series and do some sharp turn, it never happen neither. Maybe your maneuvers is under some extreme condition? Can you share with us?
from Helipal.com
Jacky Lee ...