Yes, I have copies of all of the material that you refer to and I have read the material.
I disagree with your comment with respect to whether Herb Zarrow is familiar with the so-called Racherbaumer rebuttal. I believe he is familiar with it. Herb has elected, so far, to take the high road and not wade into this mess. That may, or may not, change.
I also suggest - but cannot confirm - that I have had access to more information on this subject than perhaps you. Have you, for example, had access to or copies of original correspondence between the various parties on this issue?
Further, have you had contact with the lawyers who were retained at the time, and the documents that were drafted, when a law suit was initiated against Mr. Marlo but subsequently dropped by Mr. Zarrow out of compassion because Mr. Marlo had suffered a heart attack around the time of the suit?
Further, I'm not sure that this whole 'mess' is really worth recounting. I am writing the book on the magic of Herb Zarrow. I had planned to detail the technique and variations that Herb developed with respect to his shuffle. I did not want to present a legal brief on the subject. I left that profession a long time ago. Futher, if any such brief is developed or presented, it would be distributed in another forum than a hard cover book that presents a lifetime of his magic. My rough count suggests that there will be over a 100 items of Herb's in this book, the shuffle merely being one of them.
I, too, have spent a great deal of time on shuffle work. Probably twenty-five years. I always find it helpful to survey or review the work of the creator as their work in one area can often provide insight into their work in another.
I have not yet done an "Ask Alexander" search on Shank but would be curious whether you could point towards any of his other contributions he has made to the literature, or that have been made in his name. Is there, for example, a Shank shift, a Shank second deal, a Shank hold-out, a Shank double-lift, a Shank colour change.
I'm honestly not trying to be difficult. I am curious and I haven't got there yet. You see, like you, I like to do research. Any insight you may provide into any other work attributed to Shank would be greatly appreciated.