Double futon (Southsea PO5)

Double futon with wooden frame and beige cord cover. Has seen better days but still could be used. One side of cover has a lot of stains and there are a couple of tears.
One of the slats is broken, could possibly be fixed. Does not affect it when used as a sofa. Could be a perfectly fine sofa with a throw on it.
When used as a bed, you need to put something under the joint, we used a couple of paint pots. I got this second hand myself so don't know if I just put it together wrong or if something is missing.
As previously stated, perfectly fine as a sofa, and with a couple of paint pots also fine and comfy as a bed.