Well the lines I and other have been using ofr several years have not broken so the (angled) force on the bows can not be more then 500 kg. The angle is about 25 degrees upward and 40 degrees forwards. This suggest maximum decomposed orthogonal loading of ;

-1- max 340 kg directed inside on the horizontal
-2- max 163 kg upwards on the verticle
-3- max 326 kg forward along the hull

Checksum : sqrt ( 340^2 + 163^2 + 326^2 ) = 498.4 kg max line tension

Doe sthis help ?

More important is the fact that the fine Taipan 4.9 bows of a homebuild timber hull take the loading without any fuss or problems. I have only a very localized reinforcing in the bows. Some strip of carbon in the very tip glues agains the hull sides to distribute the point loads without having the individual wall buckline. The rest of the hull is as per building plans. Afterall the Bridle setup for the jib puts the hulls in front of the mainbeam in alot higher loading while sailing upwind.

Wouter