The dilema between adequate protection and rope drag can slow you down on this one. I got a good cam in about 2 feet from the lip of the roof and did not extend the sling. I was rewarded with a bunch of rope drag on the upper/easier part of the route. This is a fun variation and the upper "chimney" (no chimney moves required) is much more exposed than I would have thought. Also, use a cam underneath the loose pin.