Hope you don't mind me contacting you this way - I was going to get in touch via your website (that I've enjoyed many hours poring over), but this looks like a good way to communicate.
I was wondering if you offer a design review or design assistance service. I want to build a small 'cruising' cat about 7.5m, but haven't found any DIY plans that I like. I really like your tri's, and your method of design and construction suites my ideas and skills (I'm an architect and builder, and I've built two ply cobras). I've had a go at drawing up a design using Revit, Delftship and Sketchup, but what I really need is someone to firstly critically evaluate the concept, then transform it into a proper design. If you are interested, could you please give me an indication of cost for your services.