Just wondering here..................If I was designing ARF planes and selling them to the public, I would definitely let my customers know if the type of servos, placement of push rods and setup in general could cause flutter or failure. This was my 4th build, and the previous three allowed for huge control movements with standard servos; never was there an issue with flutter. If a design is susceptible to these issues, the customer should be advised. This is why Tower hobby, by request of Great Planes is including a servo setup in this Extra..........in the future.