I sit down with Japanese ju-jutsu black belt Alex Kask to discuss the benefits, pitfalls and procedures for training in traditional systems and in modern BJJ at the same time.  Both Alex and I have extensive backgrounds in both approaches, although I've done more BJJ and he's done more classical jujutsu, aikido and hapkido.  I hope you find this an informative and entertaining chat! Also while I have your attention can I remind you to download the BJJ Master App for iOS and Android?  There are more than 500 minutes of free black belt instruction on that app.  You can grab it free at https://www.grapplearts.com/masterapp

Good luck with your training,

Stephan