RE: Rotopod anyone?
I also used carbon fiber rod, but I used a hul-a-hoop around them. The wiffle balls that came with my Helimax training gear caused resonance which resulted in my heli shaking violently so I cut the rods shorter and put the hul-a-hoop on.
I'm gonna hang on to my training gear as my 8 year old daughter is interested in learning to fly helis and she'll need it.