The sides of the Creative Workstation in Woodsmith 275 have stopped dadoes for the dividers on the inside face, and large slots in the outside face for holding adjustable arms. Below are two jigs and a template to aid you in making the sides and arms accurately.
Details and Dimensions
The jigs and template can be made out of material from your scrap bin. To ensure a smooth fit, always do a test run of jigs and templates before you start routing into the sides.