Don't move the wing just add a little lead to the tail and try it. Buy the way it sounds like you built it moving components is not an easy thing so just add a little lead for the tests. When you are happy with the CG then try to move the battery or receiver to keep it lighter and still get the CG you want. All the CG changes in the world will not help if the flight surfaces are not set right and thrust issues are too far off.[8D]