Just finished reading back through this thread. Fun to see how things have progressed over the last few years. And I realized I left out a significant contoller change. A while back (now probably over a year ago) I totally redid the html portion of my contoller with a lot of emphasis on pretty graphs using http://chartjs.org I enjoyed the new graphs so much I went live with web 2.0 before building on/off override buttons. Initially I planned to add them back in. But I found that it was almost as easy for me to ssh into the pi and type the override command as it was to push the button. So I still have not gotten around to rebuilding the buttons.