8B by notorius down grader

Andreas Barth has done Satipatthana, 8B in Frankenjura. It should be kind of hard for the grade as Andreas is a notorius (“brave and humble”) down grader. As an example, Forget about life for a while he has as 8A+ meanwhile the others have it as 8B or 8B+. If Andreas would use the same gradings suggested by others, he could have been #8 in the world ranking, now he is #14.