I still do tapered wings the old way. Cut Fuse bottom out making cuts at an angle. I also have the flaps already on the wing. Once wing is in place, glue the cut section back in place. Use ply scab over the inside of the cut.
Now once wing is in place with some glue and doesn't move, I take strips of fiber glass and epoxy glue on the inside fuse wing joint. Being as I also have the bell crank posts sticking above and below the wing surface I put my ply plates over the post ends before doing the fiber glass on the wing/fuse joint. So far no failures.