I'm intrigued by your method, HettyB, and while I've used a hole punch from time to time for various things, it has severe limitations unlike your screw punch device. I'm embarrassed to say that I did not know of such a tool, but I'm off to see what's available here locally.
I also hear you about the arthritic hands. As an aside, I have found the hot wax dip periodically does wonders not only for the aching, inflexibility, but also does good things to your skin.
Thanks for the tips.