Hi Bob; I went back & looked up the article in the Sept 2016 issue of Classic Toy Trains & all I found was a short Vid of Weekend Edition of a Workshop with a "Gas & Go with a Smart Detector". Is that what you were referring me to or is there an article about servos? If there was I didn't see it. maybe if you have the article you could post it here on the forum I know many members would love to see it.
Jerry