Rocker for Mini Bonzer Light Vehicle??

Hello,

my next project should be something realy short like the Mini BLV from the Campbell Brothers.

http://bonzer5.com/boards/models/mini-bonzer-light-vehicle/

as I have no experience with such a short boards: how much rocker should i use for such a (short) board? 

mainly the board will be used for short, steep, gnarly onshore conditions.

 

regards,

andi