Don't have a QB either, but I took the skin, marked the template, and then made a lot of #40 holes just inside of the line. took a dremel cut off disk, and removed the Swiss Cheese. Just make sure that you leave enough distance to that one rivet in the main spar closest to the hole. One of mine gotten awfully close to the edge. After you put the skin on the plane, take a drum sanding tool (or half round file), and remove the material from the 704 spar.
Thomas