My Hyperflow runs smooth, with the spinner removed. First time I have had one sound as good as it does.
FWIW, I think the composite airframe of the Evader lends itself to the Hyperflow running quieter? I also have a Hyperflow installed in the new foamy F20, sans spinner, and it is quite a bit louder? Granted that a key variable between the two is also whether each fan is balanced or not. My buddy Don also has an Evader and without the spinner, his also sounds pretty smooth and quiet. Nice approach to balancing the spinner Don. Way to go!
Watching to see how your Evader does Don. I always enjoy your threads and your approach to squeezing more performance out of a model.