Positioned bottom right flap skin on workbench offset from holes used for left flap. Made sure that trailing edge holes were offset also. Marked table with positions of left flap holes, used top skin against bottom skin trailing edge to get proper spacing for trailing edge holes. Weighted everything down, used long steel bucking bar to hold down trailing edge and sandbags to beep everything really flat. Drilled holes with #40 drill and clecoed skin to table,