This hack turns an Ikea HOL coffeetable-type piece of furniture (well, they call it a storage cube) into a side-opening cabinet. (The problem is that, unhacked, the HOL is top-opening so you can't stack them.) I use two stacked together as a printer stand plus as cabinets for my PC and ham radios.
Step 1: Decide which side you want to have fold down
he HOL has two sides (opposite one another) that are potential fold-downs and two that are
not. Choose one.