Thank you horus for reminding us about RD Ellison, and for publishing the communications with Leibon. He was surprised when I contacted him wondering how I had achieved this but the answer was in his book. His reputation may have been impacted by some legal issues which you can research. What I enjoyed most with his book, setting aside his naive techniques, beliefs and attempts at humour, were the practical insights into psychological play.
I cannot see why there should be any advantage in applying Ellison's efforts to the American wheel as opposed to the French wheel. In the long term it would always balance even despite the evident column three clusterings on the American wheel. It comes down to when you start and stop, and that alone may not be good enough, let alone using small samples and toy roulette wheels.
An answer to beat roulette is to look deeper, below the surface, and find short cycle patterns that are regular predictable phenomena but invisible to the untrained eye. No doubt there are other ways also. Those are problems easily solved given sufficient time ( 10,000 hours - Tipping Point).
LG Holloway shows some remarkable and practical insights, and most importantly goes into the psychology of the player which to my mind is the most difficult and engaging task for the serious professional. Credit must be given to his outstanding, inconsistent and controversial Publisher Lyle Stuart whose passion was high stakes gambling, particularly Baccarrat in which he won major tournaments. Read the obituary in the Guardian. That in itself is some piece of work.