Just wondering how often if at all do any of you that have a rope skeg replace the rope. I bought a used NDK Greenlander Pro this past summer and was wondering for general maintenance should I replace the rope for the rope skeg? If so were do I find this rope. According to Nigel Dennis web site it uses 4mm nylon/Kevlar rope. I tried googling 4mm nylon/kelvar rope with not alot of luck.Iam in the USA so a place in the USA that has this rope would be great.