This project I finished yesterday and I am happy for that.. I made totally about 200 feet this kind of system in this house. Plan for this system was only how it looks, no details and measures so I bought aluminium chute and fasten chutes with threared rod to ceiling which I covered with aluminium pipes. Wooden parts are birch veneered mfd which are stained dark brown and lacquered. I liked how light reflects from ceiling and I bet it´s looks better when is dark.