Yesterday’s baseboard assembled. It builds into two boards (see upper picture) – compact for storage – which are bolted together to make a longer board (lower picture). Bolts with wing nuts are used to join them, so they are easily separated, and the holes in the board assure quite accurate alignment (although dowels might be worth adding to censure any rail track is really accurately aligned). I don’t plan to spare at the two boards as even combines they are reasonably compact and light, and it would be difficult to arrange the planned track to be easily separated at track joins.