I won't question your math John but I know after my first run of routering for the shelving in the cabinets, it was surprisingly sloppy. I think most cabinet makers prefer a nice snug (but not too tight) fit. I bought a 19mm router bit right away and finished up with that. I think there might have been some kind of an idea to make the 4x8 sheets metric, not sure about that. This info below says that metrication started here in '70, I thought it was after that ....
"Metrication in Canada began in 1970 and ceased in 1985. While Canada has converted to the metric system for many purposes, there is still significant use of non-metric units and standards in many sectors of the Canadian economy and everyday life today. This is mainly due to historical ties with the United Kingdom, the traditional use of the imperial system of measurement in Canada, proximity to the United States, and strong public opposition to metrication during the transition period."
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Today's Featured Article - Listening to Your Tractor - by Curtis Von Fange. Years ago there was a TV show about a talking car. Unless you are from another planet, physically or otherwise, I don’t think our internal combustion buddies will talk and tell us their problems. But, on the other hand, there is a secret language that our mechanical companions readily do speak. It is an interesting form of communication that involves all the senses of the listener. In this series we are going to investigate and learn the basic rudimentary skills of understanding this lingo.
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