OK...so I'm watching the ratings post, and Wouter put up some specs from the Shark catamaran that was designed in 1962. For anyone that hasn't had the pleasure of witnessing one of these beauties in real life, they're a 20' x 10' cat with classic timeless lines. They are still relatively fast and constructed of all wood. Even the 'trampoline' is wooden. I've admired several of these at the last few Tradewinds Regattas but I always thought they looked heavy. However, what really struck me in the post is that they weigh only 450lbs....450lbs!!! How come, 42 years later, my 18' modern foam core constructed catamaran (2' shorter, 2' less wide, and with a poly mesh trampoline) only weighs 55 lbs less?