As the side support I took unused FLEKKE bed backrest pieces. And for the second side I used BILLY bookshelves height extension units without one of the side panel.
And for the bottom I used extra BILLY shelves. Everything was tightened together using Furniture L-shape Bracket Connectors inside the shelves.
The only thing was the edges weren’t covered. (Sorry, I forgot to make photos of uncovered edges.) That’s why I used Black Preglued Wood Veneer Edge Banding. I took an iron and glued the uncovered edges. At the end I got something like this.
Also I have to drill those night stands and added some plastic covers for wires for charging devices. Since these are a night stands after all.
I’m very happy how it turned out at the end. Perfectly symmetrical and pretty useful. I think this hack makes this room look complete. )
I also have painted crown molding black. And replaced room light to a black one. In my opinion it looks pretty stylish now.
P.S. I was very lucky that everything fitted perfectly to my room and it was pretty easy and fast hack 🙂 But even if it wouldn’t fit, I would trim the BILLY units to make them fit. So there is nothing I would do the other way again 🙂