Mike,
What board is it? Our fins,
www.cdifins.com , fit every CWB board except for one. I think it is the the '04 Prodigy. The one that comes with aluminum fins. The problem is the hole pattern is a nonstandard size like 3.25". Stanard hole pattern is either 3" or 1.5" from centers of holes.
Skiing made me board,
Lyle
Chrome Dome Industries