I had the initial idea in May of 2011.
Having now finished Series 6 in May of 2014, I'm going on indefinite (perhaps permanent?) hiatus.
Still, I'd encourage people to read what I've got here so far, and if you want to build on it some way, or create your own variations on the characters, by all means! Math is, after all, universal. Just please send me a message to keep me in the loop. Thanks!