A method comprising: making a first structure with a first plurality of pre-drilled holes at pre-defined locations; making a second structure with a second plurality of pre-drilled holes at pre-defined locations; making a third structure without pre-drilled full-size holes; measuring, using a coordinate measurement machine which is an articulated measurement arm, the location and orientation of the first and second plurality of pre-drilled holes in the first and second structures; determining the location of a third plurality of holes (64T, 64S) to be drilled in the third structure that correspond to first and second plurality of pre-drilled holes measured in the first and second structures; creating a program to drill the third plurality of holes (64T, 64S) in the third structure that align with the measured location and orientation of the first and second plurality of pre-drilled holes in the first and second structures based on the measure location and orientation of the first and second plurality of pre-drilled holes in the first and second structure; sending the program to a CNC machine for drilling the third plurality of holes (64T, 64S) and clamping, by a drilling fixture, the third structure in place while drilling the plurality of third holes; drilling the third plurality of holes (64T, 64S) in the third structure based on the program while the third structure is clamped in place; positioning the third structure on the first and second structures (26, 28) such that the third plurality of holes in the third structure are aligned with the first and second plurality of pre-drilled holes in the first and second structures; and inserting fasteners through the third plurality of holes of the third structure and the first and second plurality of pre-drilled holes of the first and second structures that are aligned with the third plurality of holes of the third structure to secure the second structure to the first structure using the third structure. making a first structure with a first plurality of pre-drilled holes at pre-defined locations; making a second structure with a second plurality of pre-drilled holes at pre-defined locations; making a third structure without pre-drilled full-size holes; measuring, using a coordinate measurement machine which is an articulated measurement arm, the location and orientation of the first and second plurality of pre-drilled holes in the first and second structures; determining the location of a third plurality of holes (64T, 64S) to be drilled in the third structure that correspond to first and second plurality of pre-drilled holes measured in the first and second structures; creating a program to drill the third plurality of holes (64T, 64S) in the third structure that align with the measured location and orientation of the first and second plurality of pre-drilled holes in the first and second structures based on the measure location and orientation of the first and second plurality of pre-drilled holes in the first and second structure; sending the program to a CNC machine for drilling the third plurality of holes (64T, 64S) and clamping, by a drilling fixture, the third structure in place while drilling the plurality of third holes; drilling the third plurality of holes (64T, 64S) in the third structure based on the program while the third structure is clamped in place; positioning the third structure on the first and second structures (26, 28) such that the third plurality of holes in the third structure are aligned with the first and second plurality of pre-drilled holes in the first and second structures; and inserting fasteners through the third plurality of holes of the third structure and the first and second plurality of pre-drilled holes of the first and second structures that are aligned with the third plurality of holes of the third structure to secure the second structure to the first structure using the third structure.