As I mentioned I’m no expert so someone else might have a better way. I measured, measured again, and measured again to be sure. Once I had my spot, I used an awl to make a dent. Was super careful to get the dent in the right spot. Then I used a very small bit to drill a pilot hole, then a bigger bit to make the final hole. Shards of aluminum were made in the process, wear some eye protection.
What kind of drills did you use? What surface did you put the aluminum sides on and how did you fixate them?
I used a standard Milwaukee hand drill and regular drill bits, nothing special. Aluminum is soft so it drills quite easily. I did not remove the sides to do this, I simply turned the case on it’s side resting on my rug and drilled downward.
I should probably say again that I am not an expert in this area There is probably a better way to do this but I was successful twice using this hack.
I would use a wood backer so it doesn’t punch through and damage anything!