Valid points Jake, and work to be done if this project is really going to get anywhere. I was under the impression though that this is 'a good idea' that might go somewhere once a few are built. You know, sort of self energising. If this is going to be a structured effort to start an introductory youth class then we need more expertise and effort than is currently being displayed in this thread.

I for one, will be going my own sweet way and, when time allows, build my own design of F12 for my 13 yr old son to sail. He's currently in the RYA Topper squad but is proving too light for a Topper once the breeze gets above 10mph. An F12 could be the answer. Light, fast and cheap.