Stage One Start wit a piece of MDF: 9mm … 20" x 36"
Layout Once you have your board cut to size create your basic sections,, I have made mine as follows:- start 3 1/2" inches in from left side using 3/4" strip wood 14 1/2" deep. section one = 12" Section two =7" Section three = 6" To be honest in hindsight I would have made section two and especially three much bigger.