So... after some friendly discussions with kite buddies, I finally got to the conclusion that what I need is not a big kite, but a big board!!
I'm 1,78m and 73Kg, and the biggest kite I have is an Advance Kaiman 10m, and the board is a 133x38.
After a weekend of 12kn, where my board proofed itself insufficient, while a Spleene Door of 145x45 was more than enough to make it upwind, I decided to make my own, but using the outline of the Spleene Monster Door, of 166x50!!
Me and a friend bought some ply wood 6,5mm thick and put ourselves to work!
Each of us is making a different approach, we I've decided to cut the plank into several planks, and glue them together, while he is making it from the complete plank.
After a few weeks of on and off due to time issues, I finally got the board ready for lamination.
As you'll be able to see from the pics, I don't even have a garage to work in, so everything was done on the balcony of my building!
Here are a few pics of its current state!
Next steps will consist of making a poured epoxy rail. I've saved the exterior outline of the wood, and after that, lamination. 2 layers of 6 ounce fiber glass on top and bottom sides, with some carbon strips along the length of the board, especially through the heel positions and side channels.