How can I cheaply turn a twin bed frame, box spring and mattress into a full/double frame? (The current frame and mattress can't be disassembled or moved to a different room, so I need to expand/modify the twin frame + box spring so it supports a double mattress, then just store the twin mattress underneath it on the floor and bring in a double mattress for the top.)
Do you like your Dalselv bedframe from Ikea? Does it wobble or is it very stable? Did you finish/paint it, or did you leave it bare?