My grandson, William, and his friend, Justin, are High School Freshmen in St. 
Charles, Missouri.

They are using Computer Aided Design (CAD) and Computer Aided Manufacturing 
(CAM) at their school to design and build a bird house for me.

The instructor in the school’s engineering design course uses only millimeters 
in his CAD-CAM classes!

I am pleased to know that my new bird house will be designed and built in 
millimeters-only!

Because of “snow days” this past harsh winter, William and Justin are not out 
of school into June this school year, a little late for bird nesting, but never 
too late for a millimeter design.

Eugene Mechtly

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