I've now managed to track down most of the tricks recommended in David Regal's "Speaking Volumes" article. Many of them were outstanding effects with brilliant thinking. But I still hadn't found one that was really right for me.
I found it.
It's the one Bruce Cervon recommended, and I was incredibly lucky to have the trick shown to me by Bruce himself before I learned it, so I can truly appreciate what a complete fooler it is.
I won't even tell you what trick it is. Better you should reread the article.
But thanks Bruce, for pointing the way to this one.