Here is our jig for drilling the holes.
We use jigs for everything in the factory. When we produce prefabricated airplanes, perfect is the only acceptable standard. Jigs ensure that perfection and consistency can be achieved. You will see more jigs as we continue. I forgot one jig photo which is used to capture the landing gear and drill them out. The bolt pattern on it comes from the same CNC routing file as the bolt pattern on this jig.