Here's my main build thread on RC Airboat World's forum:
http://www.rcairboats.net/phpBB/view...hp?f=50&t=2012
Not top secret, but there are no plans either. I copied the boat Hooty301 built but smaller for a .46 size engine. Hooty's Jett .90 powered rigger has gone 84mph so far. I'm hoping to see 60mph from mine using a .46. Everything I used materials-wise should be listed in that thread. If not, ask and I'll fill you in.