I also have suffered form some chattering. The main reason of the chattering with me was caused by/due to:
- weight not centered above the board
- too much pressure at my back foot, due to the mistake I was afraid to fall
,backwards in my case, what you do then is just more weight on your
back (foot) and leaning over the back: causes just even more chatter.
So the conclusion for me was:
- stay centered above your board in any case.
- stay more upright (your upperbody)
- just push your frontfoot more, this also correct yourself because it's almost
natural that you lean too much backwards/on your backfoot in a backside,
if you are regular try to reach with your right and left hand the tip (front)
on the left of your board).
This technique also helped me a lot:http://www.extremecarving.com/tech/tech.html
I also use race/bombertechnique.
Greets, Hans.