Just wondering if anyone has made themselves a monofin blade Ive been thinking of making a fin for my sporasub variant foot pockets so i can interchange them we bi fins. Has anyone done this? Is it worth doing ? I was thinking of making it out of carbon fibre or fibre glass . And what would be the ideal shape? Should i just copy sebaks or special fins. Thanks........ Nathan:crutch :crutch :crutch :crutch