Something has changed. In all three of my 2720SLs, starting with my 2002 model, the arms simply lifted up and out. They weren't attached in any way. They did fit tightly at the ends of the couch, but weren't too hard to lift.
Your photos seem to show that the arms are attached to, or part of, the base unit. They also seem to show that the arms and base have been rebuilt by a previous owner. That makes it hard for me to offer specific advice.
Sorry
Bill
|