In order to facilitate the installation of all the necessary items in the wing and also to keep it straight while sheeting the bottom surfaces we need to build a saddle. Their are two lines shown on each of the four wing saddles which correspond to the front main wing spar. Draw a straight line on the building surface and then tack glue each saddle into position on the line making certain that they are perpindicular to the line and with the correct spacing. The four wing saddles correspond to ribs R1, R4, R8, and R12 respectively. WS5 and WS6 are provided to support the trailing edge and keep it perfectly straight while sheeting. Install them as shown in the diagram.

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