know Ron's been on the end of Nakao sensei, so he has a good idea of what it might be like to be on the end of Endo sensei. Anyone who get's the chance to train with either of these teachers should do so, it will only be a benefit, regardless of what you may think after watching the video footage.
There's a review of my time on the end of Nakao Sensei kicking around here somewhere...
I can promise you, Mr. S, from first hand experience...you could probably take your bestest shot at Nakao Sensei...you'll still go boom. But I'd love to be there to see it!