Well, now that part has disappeared. Too bad, I enjoyed it (and still remember what I saw). Shall I just forget it - or can I still make use of it (but only if you answer. No answer then has to mean: forget it).
But, please, no threadjacking discussion here. Search for MacDonald Exercises, and I'm sure you'll find a thread or three for comment and questions. Alternatively, start a new one if those in the archives do not serve the purpose. Here's a thread to get you started: http://www.lynnblakegolf.com/forum/thread4435.html.