Hi Basketcase, The easiest mistake to make when determining the length for your spinnaker sheets is to not consider the extra length needed when trapezing. This alone can add 12 feet to the length needed because it has to be doubled (6' out to a fully extended crew and 6' back). Another easy mistake to make is not considering the extra length needed for going two to one at the end of the sheet. Depending on how far the clew block is from the sheet block, that distance is also doubled and that distance can vary depending on the sail angle. The third easy mistake is to not count the extra distance a second set of sheet blocks can add to the length. It is rare that these are used WITH 2/1 sheeting, but I have seen both used together. When all these things are considered, you need to have much more sheet than you might otherwise consider. Even after you have supplied the right length based on these considerations, it is easy to forget why you have SO MUCH extra sheet and then cut some of it off, especially after racing in a bunch of light air races. Then when you race again in a breeze you don't have enough sheet to do what you need to do! Only then do you have a forehead slapping moment and remember why those sheets were so long before! Hope this helps.<br><br>