Materials: Grankulla sofa/bed, wood planks, screws
Description: I made this hack, because I use this sofa/bed only as a bed and I needed the back rest.
First I made a drawing in computer (also added with pictures), so the new part would be the same as original one, and then made these planks and put it together.
When it was made, I added upholstered and embroidered foam mattress to the backboard.
~ Piret, Estonia