hi mate ask scotty (tricat)he came up with the idea ,if you check out his gallery he has drawn up some instructions on how to make them and also has a cpl of videos of his boat sailing.they dont need rienforcing from what i understand .checkout tricats gallery .as he says 2 yrs of hard sailing speaks for itself .ill be giving it a go soon once ive got my new gas mono on the water(this weekend hopefully).sorry but i had to show her off please forgive me guys .