Installing hardwood flooring on box stairs. Each tread requires 1 bull nose and 2 planks to complete. When I get to the top tread of the box stairs, the flooring will run 90 degrees to the flooring on the stairs. My question, when I install the bull nose on the top tread of the box stairs, when do I transition to flooring running 90 degrees? Do I install 1 bull nose and 2 planks like the other treads? .... After I install the bull nose and 1 plank on the top tread the "box stairs" end. In other words one wall makes a 90 degree turn and room opens up into the foyer. Therefore do I make the transition then? Or do I just install the 1 bull nose and then install the flooring running 90 degrees up against the bull nose? In this last case the 90 degree flooring would go about 4" into the "box in part" of the top tread of the stairs?