Another thing that I didn't do for the longest time was to change the ruler in Illustrator so that 0,0 is in the center of the artboard. It's really easy to do: just go to top left of ruler and click it then drag until it snaps to the center of the artboard, then release the mouse. When you figure out how to do that, it makes it so you can just type coordinates directly from your drill template into Illustrator. The only thing to think about is illustrator flips the Y axis so that the negatives are on the top and the positives are on the bottom. So when you're transferring coordinates just keep that in mind.