I can but I'm doing this between two "really-must-do" design projects and another "really-want-to-do" design project. So I'm a little pressed for time. Meaning I will only persue it further if it actually is seriously considered to be build.

Ake, if you are going to use it on your mini650 then we surely can continue, just let me know.

I may have something you may like. You are going to use a heavy boom vang on the mini boat right ?

What do you think about a robust but lightweight hollow timber tube of varying crossection reinforced with two alu strips on top and bottom. It is made from curved timber planks. And then rounded on the sides by routing and a little bit of sanding. This leaves a flat surface (but curved lengthwise) to secure the alu strips to, you can also replace the alu with carbon cloth if that is what you want.

This trick (but excluding the alu or carbon strips) is used on traditional Dutch sailboats to get lightweight tapered timber masts without upsetting the traditional feel of the boats.

I love what you are doing with the mini, I regulary check your webpage.

Wouter