Used 30min epoxy to glue the rib doublers and are held in place with close pins. Bottom spar with ribs, the manual says to ca the LE and TE at this point but don’t! you need to Test fit the forward and aft die-cut 1/8" ply wing dowel supports in the notches in W-2. Because you will need to clean out any epoxy that oozed out from when you glued the doublers.