Can I make a suggestion re holding in place while glue sets. Use some thin plastic coated wire wrapped diagonally round the wing and fuselage and place some strips of cardboard under the wire to help protect the fuselage side and wing edges. the joining the wire in a twist, gently twist it in until the joint close. It could be a bit of a pain to get it all together but if it works, it would be worth the effort. Just a thought as it is a big kit and a great model and the effort and detail you have put in so far would be a shame to know it is marred by this error.