I am pleased to say that this project made the HaD blog:

http://hackaday.com/2016/06/01/hackaday-prize-entry-you-know-for-kids/

What an honor! Both the write-up and comments were kind and helpful. I have some good questions to answer on my description, but for now, it is great to see that other people get the concept and find useful as I do.

Feeling on top of the world,

David

P.S. I am honored that Hackaday posted my project again: http://hackaday.com/2016/07/09/hacklet-115-more-quick-tool-hacks/. It is like bringing a ladder to Mt. Everest...on top of the top.