I wanted a standing desk and we had a lot of all right quality chip board left over from the packaging of a new machine so I decided to use that. I created a press fit design using Fusion 360 and machined the parts on the Shopbot.
Following Neil's advice I made a cardboard scale model from using the laser cutter. The process was pretty informative and highlighted a couple errors in the design.
My Mum was in town so I drafted her in as chief sander.
The 1/2 inch chip board that I used wasn't quite stiff enough for the top surface and the legs so I added some cross bracing (also using scrap from the packaging for our new machine).