As I recall, it's quite a stiff stand up into a gaston with your left hand. There's a sloper on the wall for your right but it's quite poor. The footholds round these parts are crumbling so it might be harder than the given grade these days.
This may or may not be useful. If you want some beta that isn't based on hazy recollections from five years ago, maybe some other kind soul will fill in the details.