Hi Raza,
Uhm, I don't think they know. I'm hoping you might know someone who can do piro flips very fluently, and uses the thumbs. Where abouts exactly on the thumb do I place the stick. At this current time, the stick tends to slip slowly slowly out of the thumb which makes it hard for me to control the heli. If you could please ask one of your pro friends, that would be great. May be even a pic?
I've tried different sticks, and they are all the same. I don't want to buy any more. I've also tried rubber grommets, still no good.
TIA