The pilot aileron was only partially complete when I purchased this project. I weighed the other aileron just for a reference. I then set about adding weight to the front of the pilot aileron to mass balance it against itself. I also worked to get it as nearly equal in weight to the other aileron. This took quite a bit of work fitting sufficient weights to accomplish this. The weights were glued in place with T-88 epoxy. The aileron will have to have this section finished with fiberglass and then be checked for weigth and balance again.