Hi have an infussion if you have the standard spinnaker sheet it wil be a single 12 core and I found it difficult to splice direcly to the 3mm vectran, the guys at the nacra championships stiched the vectran to the 12 core about 15 cm and you can then decide on how much 3mm you want to use to tie on the clew with a bowline, I also have a 8mm dubble braid spare sheet which I exposed the core and eyespliced, great practice but not nessisary, that I tye with a 1 foot y piece and a ball.