Read the webpage again, there is indeed a reference to the 104 class, even a link to a more detailed discussion of the FX-one extreme and teh 104 class.

Price of this new "Extreme" design is 16.165 Euro compared to a 14.165 Euro Blade F16/Stealth F16.

I never knew that 30 kg of resin was so expensive ! I guess that is what the identifier "Extreme" refers too ! <img src="http://www.catsailor.com/forums/images/graemlins/blush.gif" alt="" />

Wouter