Tnx guys, i didnt know this corecell existed, only airex, but is expensive and hard to find in spain.
I already found a dealer of spsystems corecell A500, im gonna look at it.
Thanks for your usefull help, i found it so helpfull and i loved this little forum much better than the main kitesurfing one that is full of not really usefull comments.
TNX AGAIN TO ALL !!!
I'm glad you located a dealer. The core-cell will not be the cheapest core material either, usually on par with Diviny. You won't have the exploding core problem again though.. m still riding 3 boards I built in the winter of 2003 and they're in great shape...
I'd incorporate some form of heel patch reinforcement,, this helps the board last a very long time.. P.M. me if you interested in some of the heel patch tips...