Just used the Murrays Shock Cord lacing kit a week or so ago. The Advertised lengths are 20' center by two 15' end sections. There was a noticeable disparity between the amount of cord given for the center section and the amounts for the end sections. The center section had lots of length left over before the cord was stretched. The end pieces had a little left over after they were stretched tightly into place.



This might be because after 83, the rear tramp section was double grommeted, and 15' is the old measurement. Just guessing.