The last time I used the photo assembly guide was in February as I completed my ailerons. Today I was able to start using it again, since I am through with wing part fabrication (yippee). In order to set the wing dihedral, the spar tips must be installed. This is the first step in the wing assembly instructions, and things went as described. I am now prepared to set the dihedral and to drill for the attachment bolts. No rush on this step, since this must be ultra precise.