Smooth props give smooth video & most importantly -> smooth Gyro/Acc/Mag/GPS performance. Is your Quad or Hexii flipping out after 4-5mins - its most likely caused by residual vibration causing accumulated LEVEL spikes going to the CPU. These propeller Balancers are the best & most accurate prop balancers you can get anywhere for MultiCopter props to balance them in 2D. these are far more accurate than magnetic balancers for our EXTENSIVE hands on balancing experience. Some pilot try anything to avoid balancing including believe forum posts that some brands don't require balancing ? It's a myth - for video - all props must be balanced - thats the truth.