I have been active in shorin ryu karate since around 1996. Except for a period of 2 years where I was on my own and practised alone. Until last year I was following the same association and graded to 3 Dan. Last year I found a new sensei who teaches the same style but from another association. His sensei and the actual head of the association I belonged to were senior students of Chibana Chosin. Despite being the same style, I have had to start over completely and relearn because I was severely lacking. I am totally overwhelmed by what I was never taught. I felt I did not have anywhere near the standard of my former rank. It was as if all my time training was for nothing...I made the choice to accept starting over but it is still difficult to actually do it while training. Does anyone have the same experience? How did you deal with it?