Re: cross training
Cross training is great as long as you hold one idea in the back of your mind firmly, Progress comes from the inner development of a "martial body/spirit" from which all techniques originate, so the path is one of throwing away what we have used to arrive there, not endlessly gaining more half understood tricks. Whilst still in the process of "what if this or that?" then cross training can often have an appeal to what is lacking in our deep understanding of the art we practise, rather than in the art itself. Technically there is no system that contains all needed for combat, but all genuine arts contain a path for going beyond techniques if we have the wisdom and stamina to follow it.