Many thanks for all of the advice, it has been a great help.
I now have the problem of winter coming and am wanting a project. I think widening the boat to F16 is the most logical. Can I use my old mast section to replace front beam? Am I crazy to look at using a second hand A class carbon mast as a replacement wing? Am I crazy to look at ex carbon masts as replacement for front beam and glue rather than bolt? I notice some 18s are doing this for a more rigid platform.
Cheers, Lester