In my experience, the gap from 7k to 3k actually is mostly about the sense of the game, rather than skill and technique. To be precise, I don't think reading sk

In my experience, the gap from 7k to 3k actually is mostly about the sense of the game, rather than skill and technique. To be precise, I don't think reading skill is that much difference, but 3k know better what to read, what constitutes weak or strong group. Joseki definitely isn't an issue well into dan level.