Here are the first 5 segments evened up and glued. As you can see, the carbon spar ends at this juncture and there is a tapered aluminum spar which goes inside the carbon and continues on out through the smaller sections.
The holes you see along the top of the airfoil are where we poured the resin to saturate the spar/foam interface. The binder clip hold the trailing edge nice and even while the resin cures.