I think I followed SuperD's method last year. This year I downsized by one just because they seemed kind of big. Not sure if that was a good idea because the old way work - hope I didn't screw that up.
I'm going to make a few with 6mm beads to run on one side of the boat just to see if I can target bigger fish... who knows I'll probably end up with kings101bananna101
Bluknight, looking at stacked beads on a wedding ring, they look like they are pretty close to your sizes. I don't think you'll have any problems catching fish with that combo.