The Professor left us a lot of material in the art that he created and promoted. That raises the question...should the art be evolved, or should it be preserved as the Professor left it to us? It was certainly continually evolving in the Professor's lifetime, and the name 'modern' would seem to imply that it should remain current and useful...yet, with single and double stick, some knife and sword, shotokan katas, and the small circle form of jujutsu, there's enough material in there for anyone! The idea of preserving the Professor's teachings seems respectful to me, and if the art continues to evolve then perhaps in several generations it'll fail to resemble his art at all. That seems a shame. Yet, the idea of simply freezing it as is doesn't seem in line with the Professor's philosophy. What's the right thing to do?