Balancy moves lead to a convergence with Positron. Climb the slab left of the crack or the crack itself. The crack is a variation of the Positron called Gluon 5.8.
Originally climbed on gear by Reg Smart in 1986. Smart returned and bolted the route in 2012. A variation of the start was possibly climbed by the prolific Chas Yonge in the early 1980s and called Electron.
FA: Reg Smart (2012)