My design is done at 12 ft 4.5 inches.
It just happened this length allowed me to do what I wanted.

On the other side of the coin the beam , mast length and sail are a little less.

I will build it as light as I can without the use of materials that will increase the cost and based on my own estimates I hope to come in around 50kg.

The rules document is a good idea to provide some clarity and focus.

Regards,
Phill

I know that the voices in my head aint real,
but they have some pretty good ideas.
There is no such thing as a quick fix and I've never had free lunch!