Walter wrote an article for my club's newsletter, and has posted it on his blog.... the subject was originally around conifer fertilization... but he handled the subject from his wholistic approach and included watering and substrates... VERY cool piece of writing!
It's very worth a read... Huge thanks to Walter for being so kind as to provide something of such value to my humble little club.
It goes to the heart of something I've long felt and tried to correct, though not so well as this... That many people often focus on styling - without having sound understanding of horticulture. This just may help clear the waters for some people.
Granted... I think most bonsai growers wouldn't have the time or dedication to put to it that Walter has... but I still see it as something of an ideal. And if the proof is in the pudding.. it works because there is no question about the health or vigor of his trees.