To achieve significant rank (purple belt) under one instructor and then to be promoted further by another instructor? Let me explain... I hope to be done with my degree + masters within 5 years, after which there are many job opportunities I want to pursue that could end me up in London for several years. TRAIN WITH ROGER!! WHOO! My problem is this. I'm already a high stripe blue belt under great BB's in a great organization. But within 5 years I definetely should be to purple and ergo I could theoretically attain black belt while living in London. Would it be a major disrespect to be ranked by another Prof. after I was already a purple under another? None of this is set in stone, I was just curious.