Sit start! Sit, do not crouch, on the sloper at the base of the pinch feature, that forms the right side of the hueco. Climb up and left into the hole, ultimately finishing on Inner Sanctum. Fun, unusual feature climbing. An enjoyable high start (see Gleaming High) is often done, but is equally often confused for the full line. As a historical note, this climb was first done from starting holds even further down and left. They broke off completely, years ago, which in large part explains the confusion around the "official" start and grade of this climb. All that aside, it's a fun romp, just enjoy it and don't stress the details too much.