Tom, I have been using your methods for a little while now and I know very little about metric. Any woodworker should know enough basic math to follow your plans and make a similar project using imperial. Your metric dimensions are only needed to make an exact copy. So I recommend you keep doing it the best way you can to get your point across. And I encourage others to try your methods of template guided plunge routing. I have found it to be very safe, and fun.
__________________ Rusty  If You Want It Bad, You Get It Bad The Worse You Want It, The Worse You Get It  |