RE: joining wing center section
widest layer first. Not intuitive but this may be the strongest since the wide piece is in contact with the balsa. Now lets see. If the bottom of the wing is done first the top can be wraped around the leading edge hiding any irregularity since this is a high wing trainer. I will attempt to post an image of what we are working with. It is bad weather here in NC so the next couple of days are building days.
thanks for the ideas
Jerry