Thanks for the advice Phill, those are some excellent designs on your site. I'll take on board what you have said and look at doing away with the hull beams. I initially incorporated these only to give height for the trampoline, as I am using flat hulls. Your comments have given me a few ideas to lighten the design a little.

Jake, I know the sensible thing to do would be to buy plans for a tried and tested design, however, most of the fun for me is in trying to build my own design.

Cheers