1st I would like to say I do agree stretching machines CAN help greatly. I have one that I use regularly for a reading chair.
With that being said, Kurz book is not something that you read in the store, from my experience with his book it is a very slow read with use in between reading. I personally needed to read his book a couple times through to make sure I was getting things right. Unless I am mistaken and you spent a whole lot of time at Barne's and Noble I do not believe you gave it the effort it needs to be sucessful. I am sorry if this seems bashing, and I am by no means a Kurz wannabie, just making a point not to shoot it down without proper research and use. Beyond that great advancements, I hope you continue to see the benefits of your stretching routine.
Some things move, most things breath, anything can be destroyed.