After topping out on the Southwest Couloir, you will come to the section where class 3 scrambling begins. It should be noted that some of the scrambling is very EXPOSED. I agree with the author of the Southwest Couloir Route that you will not need ropes on this section and that if you do, you are off course. Scrambling will continue as you wind up and around rocks. During our climb (June 27 2009) we had to negotiate around a large cornice just before the summit.