Hi weiland,
Untill now extremecarving boards didn't exist on the market!
The only ones were our prototypes (that everyone can
get now!).
The difference with a standard board is that they have been optimized to ride vertically on the edge.
Every parameter has been tested: radius, length, width, nose, flex, etc...
But the most important is the
ATC Matrix that allows a total control of the torsion stiffness and repartition.
Note that this system brings a huge a benefit on the overall behavior, in any situation, not only in EC.
Jacques