I know there are quite a few posts about this topic but I did not find the answer searching the forums.
So far the planes I've assembled, the manuals state to coat the wing joiner with epoxy and then join the halves together.

For me, it seems to make more sense epoxy the joiner into one side, let it dry and then join the halves together. That way you're insured the the joiner is inserted to the halfway point in each side. Has anyone done it this way?