I've been trying to create a good golf ball manipulation routine. I am working on de Kolta's 2 shell flash appearance, similar to the way Shimada teaches it on his tape. Billy McComb was kind enough to teach me his routine. I've read Now You See It, Now You Don't and part of the section on this topic in Routined Manipulations. I'm using Fakini's Multiplying Golf Balls, with 4 shells, if that helps.