Pull the bulge, walk it up, pull multiple roofs. :)
You shouldn't be able to miss it. Variations of the start, all ending in nearly the same place.
To get down if you're running laps is just being lowered. Alternatively, if you're the last to go, mantle it, tear down your rig, and rap on the slab via tree or downclimb the 5.3 acent many of us use to put up the Double O.
Top rope.. using two bolts and stone flake.
SD on Double O
DW on Double O