Hey folks,I had a nice sail in the 170 yesterday but noticed that the new main halyard I just installed is not up to the task. I purchased 50 feet of the 1/4" Marlow Ropes super Pre-stretch line in blue, as my topping lift is plenty stiff and is basically the same line, only white. Well, the 1/4" "Pre-stretch" exhibited about 2 FEET of play when I really tightened down on it while raising the main (not to mention while using the trailer winch attached to the halyard d-schackle to tension the forestay). So the question is: (for those of you who've had to replace your halyards-- my boat's a '99) What lines have you other 170 sailors had success with for this purpose? I've always liked New England Ropes' Sta-Set for other jobs, but am not sure if it would travel freely over the masthead tackle/pulleys. Thanks for your ideas,Mike G.