After about a year of use, the control lines for the rudders on my (wonderful) Prindle 16 are just about cut through in a few places. May I ask three questions? 1. Is this a normal situation? 2. What sort of abrasion resistant lines should I use? and most importantly, 3. Is there a simple way of threading the lines through the internal part of the rudders, something that looks like a difficult task. My manual simply states "thread lines through." Your help would be appreciated!