In reply to MrRiley:
Done both. I found the crack on Amethyst Pillar tough (can't jam) but really enjoyed it - I was quite happy to be on the easy end of the rope for the crack though. Grey Slab I thought was excellent and I'd happily do it again.
If you return The Fly ain't half bad either but a long way to go for a single pitch.
Nice write up 😀