"07/12 very late" we hope to descent from the summit and be on the way back. Could your be a day or 2 earlier?
Ye, people have soloed it. Crevasses should not be on the route. So, if you come to the point where you need to jump through a crevasse, probably you're on a wrong path.
Generally if you have prior glacier travel experience, a good sense of direction and a common sense you should be fine.
Looked at your link, seems we have been at the same time in the same place but don't know each other or didn't had a chance to meet.