butters,

I have 3 on mine and it behaves like stock; and it still goes forward without hesitation. I haven't been able to go outside, yet (winds) but it moves pretty good indoors, and I have very good stability with the shortened flybar with 3 weights.

Slap the stock back on and You will see what I'm talking about; because it has no hesitation, (that I could see) it builds speed, even with the stock on; so experiment.

I just hate how the stock bends so dang easy, so I will put the carbon fiber re-inforced slightly shorter one back on with 3 weights; but I'm going longer on the flybar, now that I can for better stability, just a tad shorter than stock, but with the re-inforcement, I think maybe I can have the best of both worlds; finally.

Gary