The video looks good. I'm not a math-a-mutt-ician, but see a couple things that raise questions to me.
First, the bottle is not supported on both ends/sides like a wheel, and
the weight is about as far from the shaft as possible, of course it's gonna gyrate wildly.
Second,why not use a solid shaft, it will still exhibit unbalance just not as "dramatic".
Third, They used 1 oz. of beads to balance aprox. 3/4 oz of unbalance, in a 3 inch diameter bottle. Dyna Beads website recommens 1 0z. for most front wheels, 18"-21", isn't there a correlation (right word?) of weight vs. diameter? How do you estimate how far out of balance your tire is, or do you just balance a percentage of the unbalance? Or add 4 - 5 oz. of beads to make sure you are covered?
There's other questions too, but I'm about to time out on this reply. I would like to believe in them,, but. :bigsmiley29: