Ready to assemble furniture system

A ready to assemble boxed sofa in a transport mode and convertible to an assembled use mode, the sofa comprising:

• a wood framed seat base with a pair of arm rests and a seating portion extending between the arm rests, the arm rests having a pair of elongate KD brackets on inward facing surfaces of each of the pair of arm rests, each KD bracket having a wedge portion on the inward facing surface and a flange portion unitary with the wedge portion and displaced from the inward facing surface, wherein each bracket is attached with two bolts extending through two through holes in the respective bracket and threadingly engaged with T-nuts embedded in a respective arm rest frame member;
• a wood framed backrest, the backrest having a pair of panel frame members with slots therein sized to the wedge portion of the KD brackets, the wood framed backrest positioned above the seating portion of the seat base and between the pair of arm rests and rotatable and lowerable to a seating position on the wood framed seat base constituting the use mode;
• instructions for assembling the ready to assemble boxed sofa;
• and
• a box containing the wood framed seat base, the wood framed backrest, and the instructions.