0005 00  TM 10-1670-287-23&P NOTE Pull both lines evenly before looking at the ruler to ensure an  accurate measurement can be obtained. Adjust knot at the toggle  to obtain correct length.  s.  Grasp canopy fabric near line 8D attaching loop. Moving to center of canopy, pull line 8D and the  control line on the left riser and compare lengths to ensure control line is 15-inches (+ 1-inch)  longer than line 8D.  Change 1  0005 00-18  15 ±  1-IN.  Line 8D  Control Line