To fit the last bit of the top skin, I started by chamfering the main skin along the main spar and the first main rib to conform with the shape of the curved section that would be glued in place. Then, yesterday, the leading edge was glued into place leaving the outboard edge and the rear edge loose. This anchored one edge and ensured that when the outboard edge and trailing edge of the piece were pulled down the panel would take up a nice curve. Today, the rest of the panel edges were glued and the section clamped into position while the glue dries. Meanwhile the topskin was trimmed around the rest of the leading edge, the wing tip and the trailing edge ready for the front section of the leading edge to be glued into place.
