Urchin follows the Standard Route until it exits left into the chimney. At the top of the upper dihedral continue straight up ever steepening finger buckets until the surprise move to the "urchin". Find the two finger pocket with your left hand and mantel onto the slab.
Start Standard Route (look for the blocky holds).
Stainless bolts above top out. Use long slings to extend over the chimney.
Making the reach to the "urchin" is the crux, but ...
Feet . . .