This one went through a long and torturous build process over almost two years. All I can say is don't believe the "advice" you find on talk_ass. However, in the end, it turned out to be a pretty nice instrument.
Laying out for the angled double lipstick bracket. The straight one is at the left, in the center I have cut out my drawing and Scotch-taped it to the aluminum blank. Then I punched the centers through the paper. That's what the black tool is - a spring-loaded punch. It is used to make dimples in material to accurately start a hole. If you don't have one of these in your toolbox, get one - under ten bucks. It works great on woods and soft metals, and even mild steel. The accuracy of your drilling will improve tremendously.