John Adler covers a lot of ground. Sometimes we miss the basics when we get all caught up in YouTube video hype. ONE of the beauties of places lie Arboristsite.com is we can have discussion here in the forums to grind thru the theory and data of a particular subject. On YouTube, as great as it is, a person / creator generates content and thru force of celebrity can make theory established truth. Also the same place can carry "down to earth" type content as this one I will drop a link for. THEN we can discuss the pro's and cons. SO Kudo's to arboristsite.com and places like it as well as folks like John Adler willing to put up possibly controversial content to counter the random Fad's on their way to reality....as perception is reality right? This is a little dry as most "educational" videos are. But the information contained within will help a person parse the barrage from sources selling an idea as much as a science.