seems to me if you followed the plans you would have
foamed and glassed your center section first to the
division line between the center section and the outer
wing panel line on a plane that corresponds to the
wing attach bolts you could have used the butt end of
the foamed and glassed center section airfoil profile
as your sanding guide for your outer wing panel
root end sanding guide. otherwise you will have to
extend the 48 inch AS50whatever template to the
attach bolt line to be able to use as a sanding or
hot wire guide. however you have determined
to shape your foam cores .
I hope I read Your problem correctly
Don Chisholm chizmsupholst...@rogers.com