To make the 22 1/8″ long aluminum rails from 72″ stock, on a band saw with a 20″ throat, leaveĀ an inch between marked pieces. Cut at a diagonal to fit through the band saw, then trim angled ends leaving 1/8″ fat on rough flat ends. Sand to net and chamfer on a vertical belt sander.
![Machine building x y color.](http://fab.cba.mit.edu/classes/863.14/people/daniel_rosenberg/wp-content/uploads/2014/12/rainbow_machine_all-300x294.jpg)