I want to use pullies to lift my bed up to the ceiling of the bus for storage during the day. I'm only 4'10", older woman. so I can still walk under it! I thought I could rivet attachments for the pullies into the "ribs" that run across the ceiling behind the sheet metal? It only needs to support about 50 lbs of mattress, plywood, 2x3's. Does anyone know if these ribs are located behind the rivet lines where each ceiling panel connects to the next one? Any input is appreciated on if this is a good idea or am I totally on the wrong track?

