I have started the wing showing the details of the sectional wing. The main spar 1/4"x3/4"' was cut on a table saw from a clear 1"x6"x6' pine. The main spar is pinned to over the plan with the wing joiner placed on top of it, than the pocket spar is layed on top of the joiner and the ribs are glued in carefully to avoid getting glue on the joiner so it can be pulled back out.
I use this method successfully on sectional wing construction on almost all of my large 100cc powered warbirds.