In November 2015, Jorg Verhoeven repeated James Kassay's direct variation of Dai Koyamada's 60+ move roof climb The wheel of life, ~8C/9a, in the Hollow mountain cave in the Grampians, Australia. Now there's a video.
At first I thought "The BIG 4" was referring to some four ground breaking climbs in the world, especially as he has already freed the Nose, which would fit nicely up there, but apparently there is a Grampian's Big 4:
Groove Train, 8c
Wheel of Life, 8C/9a
Eye of the Tiger, 8a
Jorg climbed all of the above.