Okay Rolf, with regard to your comments. Yes, you are quite right, normally If you are lucky to have a non-problem body you can train yourself until you are maybe hunderd and/or die.

But as you understand already my sailing career has unfortunately damaged my body by constant "sur-charge" (overload) which showes up now with aging. My biggest problem is my shoulders with on each side a thorn labrum, which infact is medically only known after serious motoraccidents.
In my case it is indeed caused by constant hanging in overload sailing conditions in wintertime on ropes, wishbones and so on. I have let myself been operated ten years ago by a orthopody professor, but his repair didn't hold.

So far about the unlucky sport-career. With regard to the beams:

As you might see on the picture, they have the sectional profile form of a diamond which gives less water resistance and helps against torsional stress.
This diamond profile is internal built up with wood from 18 mm thickness. The wood is red cedar (light) and plain sawn! out of the tree. In the middle of the diamond there is also an red cedar stringer which connects up and down. The two internal "holes" left and right are foamed up with PU foam. By the way the wooden parts are glued together with thickened epoxy and are (as far as it was possible) finished with epoxy "fillets". The holes to work in were very small.
The result was already a very stiff and strong wooden beam which weight about 7 kg.
This was covered with one layer of square glass (280gr.), a layer of square carbon (200gr), two layers of unidirectional carbon (2 x 340gr.), one layer of carbon /kevlar (165 gr.) and finally a finishing layer of glass (160gr. ). Total beam weight 11 kg.!

Yes, I know heavy-duty and weighty. But the beams were my greatest fear.


The mast step finally is the normal half-ball from prindle which I screwed on the sawned rod from a prindle dolphin striker.