I have been using Air knight lately and i have noticed that the lighter the bey is the more it glides on the Stadium possibly adding more stamina Points to the Driver. Even though Eternal-S has more Stamina then most drivers maybe we can reach into the drivers full potential and launching it in a certain way can effect the beyblades performance. I recommend Launching it at a angle where air knight is facing upward maybe its possible to Fly instead of Dropping Hard into the stadium.

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my advice is try launch it like a garuda but don't dip the launcher far down try and get a flat launch as this maximises stamina and while give maximum gravity hopefully