We have started putting up the OSB wall boards at last! We have inserted all the conduit pipework inside the walls down from the Utility Rail (and one upwards!). we were making sure we have everything in place as planned before we permanently nail on the OSB sheets!
The Light Channel is made of 150mm wide 9mm thick hardwood plywood, screwed down on top of the OSB boards to create a flange and a gap for the fluorescent lamps and controller to slide into.