Thanks, The more I read the manual the more it makes sense. I attach the struts center point to the fuselage then the forward strut arm on each wing. Measure or eye ball incidence, if all looks well, then mark the strut rear arm location for drilling, then attach the rear strut arm to the wing. I'm assuming the at the wing could twist when ap[pling pressure to the rear stru when attaching. I will attach the rear with the plane up side down on a level surface covered by short carpet. This procedure should keep me from twisting the wing while I attach the rear struts.