I know this has been discussed before but I cannot find any useful info using the search function so I need a little assistance. I am happy to do my own design work, I'm just looking for these things: Specifically I would like to know the measurements that a Hobie 18 magnum wing/rack extends from the side of the boat AND above the deck (I had one for many years so I am familiar with how it sails), how wide the actual sitting portion is, and also how much one weighs for reference. Last, does anyone know a good website to determine deflection for aluminum tubing of various dimensions? Thanks!